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WID-SEC-W-2026-1228
Vulnerability from csaf_certbund - Published: 2026-04-21 22:00 - Updated: 2026-04-26 22:00Summary
Mozilla Thunderbird, Firefox ESR und Firefox: Mehrere Schwachstellen
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Thunderbird ist ein Open Source E-Mail Client.
Firefox ist ein Open Source Web Browser.
Angriff: Ein Angreifer kann mehrere Schwachstellen in Mozilla Thunderbird, Mozilla Firefox ESR und Mozilla Firefox ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um falsche Informationen darzustellen, und um Sicherheitsvorkehrungen zu umgehen.
Betroffene Betriebssysteme: - Linux
- Sonstiges
- UNIX
- Windows
References
{
"document": {
"aggregate_severity": {
"text": "hoch"
},
"category": "csaf_base",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "de-DE",
"notes": [
{
"category": "legal_disclaimer",
"text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
},
{
"category": "description",
"text": "Thunderbird ist ein Open Source E-Mail Client.\r\nFirefox ist ein Open Source Web Browser.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein Angreifer kann mehrere Schwachstellen in Mozilla Thunderbird, Mozilla Firefox ESR und Mozilla Firefox ausnutzen, um seine Privilegien zu erh\u00f6hen, um einen Denial of Service Angriff durchzuf\u00fchren, um Informationen offenzulegen, um falsche Informationen darzustellen, und um Sicherheitsvorkehrungen zu umgehen.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Linux\n- Sonstiges\n- UNIX\n- Windows",
"title": "Betroffene Betriebssysteme"
}
],
"publisher": {
"category": "other",
"contact_details": "csaf-provider@cert-bund.de",
"name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
"namespace": "https://www.bsi.bund.de"
},
"references": [
{
"category": "self",
"summary": "WID-SEC-W-2026-1228 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1228.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-1228 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1228"
},
{
"category": "external",
"summary": "Mozilla Security Advisory mfsa2026-30 vom 2026-04-21",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-30/"
},
{
"category": "external",
"summary": "Mozilla Security Advisory mfsa2026-31 vom 2026-04-21",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-31/"
},
{
"category": "external",
"summary": "Mozilla Security Advisory mfsa2026-32 vom 2026-04-21",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-32"
},
{
"category": "external",
"summary": "Mozilla Security Advisory mfsa2026-33 vom 2026-04-21",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-33/"
},
{
"category": "external",
"summary": "Mozilla Security Advisory mfsa2026-34 vom 2026-04-21",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-34/"
},
{
"category": "external",
"summary": "Debian Security Advisory DLA-4546 vom 2026-04-23",
"url": "https://lists.debian.org/debian-lts-announce/2026/04/msg00027.html"
},
{
"category": "external",
"summary": "National Vulnerability Database CVE-2026-6748 vom 2026-04-22",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6748"
},
{
"category": "external",
"summary": "National Vulnerability Database CVE-2026-6750 vom 2026-04-22",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6750"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:10610-1 vom 2026-04-25",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/6VX2E6MLQKO7DPWQ4ZZHUP2YTTOARCJ2/"
},
{
"category": "external",
"summary": "Debian Security Advisory DSA-6229 vom 2026-04-24",
"url": "https://security-tracker.debian.org/tracker/DSA-6229-1"
},
{
"category": "external",
"summary": "Debian Security Advisory DLA-4549 vom 2026-04-26",
"url": "https://lists.debian.org/debian-lts-announce/2026/04/msg00030.html"
}
],
"source_lang": "en-US",
"title": "Mozilla Thunderbird, Firefox ESR und Firefox: Mehrere Schwachstellen",
"tracking": {
"current_release_date": "2026-04-26T22:00:00.000+00:00",
"generator": {
"date": "2026-04-27T08:44:16.530+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.5.0"
}
},
"id": "WID-SEC-W-2026-1228",
"initial_release_date": "2026-04-21T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-04-21T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-04-22T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von Debian aufgenommen"
},
{
"date": "2026-04-23T22:00:00.000+00:00",
"number": "3",
"summary": "Anpassung CVSS Bewertung gem\u00e4\u00df NVD Angaben"
},
{
"date": "2026-04-26T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von openSUSE und Debian aufgenommen"
}
],
"status": "final",
"version": "4"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"category": "product_name",
"name": "Debian Linux",
"product": {
"name": "Debian Linux",
"product_id": "2951",
"product_identification_helper": {
"cpe": "cpe:/o:debian:debian_linux:-"
}
}
}
],
"category": "vendor",
"name": "Debian"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c150",
"product": {
"name": "Mozilla Firefox \u003c150",
"product_id": "T053198"
}
},
{
"category": "product_version",
"name": "150",
"product": {
"name": "Mozilla Firefox 150",
"product_id": "T053198-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:firefox:150"
}
}
}
],
"category": "product_name",
"name": "Firefox"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c140.10",
"product": {
"name": "Mozilla Firefox ESR \u003c140.10",
"product_id": "T053196"
}
},
{
"category": "product_version",
"name": "140.1",
"product": {
"name": "Mozilla Firefox ESR 140.10",
"product_id": "T053196-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:firefox_esr:140.10"
}
}
},
{
"category": "product_version_range",
"name": "\u003c115.35",
"product": {
"name": "Mozilla Firefox ESR \u003c115.35",
"product_id": "T053197"
}
},
{
"category": "product_version",
"name": "115.35",
"product": {
"name": "Mozilla Firefox ESR 115.35",
"product_id": "T053197-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:firefox_esr:115.35"
}
}
}
],
"category": "product_name",
"name": "Firefox ESR"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c140.10",
"product": {
"name": "Mozilla Thunderbird \u003c140.10",
"product_id": "T053194"
}
},
{
"category": "product_version",
"name": "140.1",
"product": {
"name": "Mozilla Thunderbird 140.10",
"product_id": "T053194-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:thunderbird:140.10"
}
}
},
{
"category": "product_version_range",
"name": "\u003c150",
"product": {
"name": "Mozilla Thunderbird \u003c150",
"product_id": "T053195"
}
},
{
"category": "product_version",
"name": "150",
"product": {
"name": "Mozilla Thunderbird 150",
"product_id": "T053195-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:thunderbird:150"
}
}
}
],
"category": "product_name",
"name": "Thunderbird"
}
],
"category": "vendor",
"name": "Mozilla"
},
{
"branches": [
{
"category": "product_name",
"name": "SUSE openSUSE",
"product": {
"name": "SUSE openSUSE",
"product_id": "T027843",
"product_identification_helper": {
"cpe": "cpe:/o:suse:opensuse:-"
}
}
}
],
"category": "vendor",
"name": "SUSE"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-2781",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-2781"
},
{
"cve": "CVE-2026-33626",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-33626"
},
{
"cve": "CVE-2026-6746",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6746"
},
{
"cve": "CVE-2026-6747",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6747"
},
{
"cve": "CVE-2026-6748",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6748"
},
{
"cve": "CVE-2026-6749",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6749"
},
{
"cve": "CVE-2026-6750",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6750"
},
{
"cve": "CVE-2026-6751",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6751"
},
{
"cve": "CVE-2026-6752",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6752"
},
{
"cve": "CVE-2026-6753",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6753"
},
{
"cve": "CVE-2026-6754",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6754"
},
{
"cve": "CVE-2026-6755",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6755"
},
{
"cve": "CVE-2026-6756",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6756"
},
{
"cve": "CVE-2026-6757",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6757"
},
{
"cve": "CVE-2026-6758",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6758"
},
{
"cve": "CVE-2026-6759",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6759"
},
{
"cve": "CVE-2026-6760",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6760"
},
{
"cve": "CVE-2026-6761",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6761"
},
{
"cve": "CVE-2026-6762",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6762"
},
{
"cve": "CVE-2026-6763",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6763"
},
{
"cve": "CVE-2026-6764",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6764"
},
{
"cve": "CVE-2026-6765",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6765"
},
{
"cve": "CVE-2026-6766",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6766"
},
{
"cve": "CVE-2026-6767",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6767"
},
{
"cve": "CVE-2026-6768",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6768"
},
{
"cve": "CVE-2026-6769",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6769"
},
{
"cve": "CVE-2026-6770",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6770"
},
{
"cve": "CVE-2026-6771",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6771"
},
{
"cve": "CVE-2026-6772",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6772"
},
{
"cve": "CVE-2026-6773",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6773"
},
{
"cve": "CVE-2026-6774",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6774"
},
{
"cve": "CVE-2026-6775",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6775"
},
{
"cve": "CVE-2026-6776",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6776"
},
{
"cve": "CVE-2026-6777",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6777"
},
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"T053198",
"T053196",
"T053197",
"2951",
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"T053195",
"T027843"
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"title": "CVE-2026-6778"
},
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},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6779"
},
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"title": "CVE-2026-6780"
},
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"T053196",
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"title": "CVE-2026-6781"
},
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"T053198",
"T053196",
"T053197",
"2951",
"T053194",
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},
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"title": "CVE-2026-6782"
},
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"cve": "CVE-2026-6783",
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"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
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},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6783"
},
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"cve": "CVE-2026-6784",
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"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
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},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6784"
},
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"cve": "CVE-2026-6785",
"product_status": {
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"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
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},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6785"
},
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"cve": "CVE-2026-6786",
"product_status": {
"known_affected": [
"T053198",
"T053196",
"T053197",
"2951",
"T053194",
"T053195",
"T027843"
]
},
"release_date": "2026-04-21T22:00:00.000+00:00",
"title": "CVE-2026-6786"
}
]
}
CVE-2026-6776 (GCVE-0-2026-6776)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Incorrect boundary conditions in the WebRTC: Networking component
Summary
Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.8 (High)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Nan Wang
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CVE-2026-6785 (GCVE-0-2026-6785)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-22 03:56
VLAI?
EPSS
Title
Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150
Summary
Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
8.1 (High)
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Andrew McCreight, Ashley Zebrowski, Brian Grinstead, Christian Holler, Maurice Dauer, Tom Schuster and the Mozilla Fuzzing Team
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CVE-2026-6765 (GCVE-0-2026-6765)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Information disclosure in the Form Autofill component
Summary
Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
5.3 (Medium)
CWE
- CWE-359 - Exposure of Private Personal Information to an Unauthorized Actor
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
ABDULAZIZ ALASAIQAH
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CVE-2026-6767 (GCVE-0-2026-6767)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Other issue in the Libraries component in NSS
Summary
Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
5.3 (Medium)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Haruto Kimura
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CVE-2026-6753 (GCVE-0-2026-6753)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:35
VLAI?
EPSS
Title
Incorrect boundary conditions in the WebRTC component
Summary
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.3 (High)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
jmwebdevelopement
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CVE-2026-6747 (GCVE-0-2026-6747)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:08
VLAI?
EPSS
Title
Use-after-free in the WebRTC component
Summary
Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.5 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Nan Wang
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CVE-2026-6771 (GCVE-0-2026-6771)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Mitigation bypass in the DOM: Security component
Summary
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
9.8 (Critical)
CWE
- CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Rayhan Hanaputra
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CVE-2026-6748 (GCVE-0-2026-6748)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Uninitialized memory in the Audio/Video: Web Codecs component
Summary
Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
9.8 (Critical)
CWE
- CWE-457 - Use of Uninitialized Variable
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Inseo An
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CVE-2026-6755 (GCVE-0-2026-6755)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Mitigation bypass in the DOM: postMessage component
Summary
Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
6.5 (Medium)
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
paranoidmoth
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CVE-2026-6770 (GCVE-0-2026-6770)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Other issue in the Storage: IndexedDB component
Summary
Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
6.5 (Medium)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Dai
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CVE-2026-6763 (GCVE-0-2026-6763)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Mitigation bypass in the File Handling component
Summary
Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
6.5 (Medium)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Tomoya Nakanishi
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CVE-2026-6769 (GCVE-0-2026-6769)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-23 03:56
VLAI?
EPSS
Title
Privilege escalation in the Debugger component
Summary
Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Tomoya Nakanishi
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CVE-2026-6749 (GCVE-0-2026-6749)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:07
VLAI?
EPSS
Title
Information disclosure due to uninitialized memory in the Graphics: Canvas2D component
Summary
Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.5 (High)
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Inseo An
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CVE-2026-6777 (GCVE-0-2026-6777)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Other issue in the Networking: DNS component
Summary
Other issue in the Networking: DNS component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
5.3 (Medium)
CWE
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
b00rito
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CVE-2026-6766 (GCVE-0-2026-6766)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Incorrect boundary conditions in the Libraries component in NSS
Summary
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.5 (High)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Haruto Kimura
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CVE-2026-6768 (GCVE-0-2026-6768)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Mitigation bypass in the Networking: Cookies component
Summary
Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
9.8 (Critical)
CWE
- CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Satoki Tsuji
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CVE-2026-6784 (GCVE-0-2026-6784)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-22 03:56
VLAI?
EPSS
Title
Memory safety bugs fixed in Firefox 150 and Thunderbird 150
Summary
Memory safety bugs present in Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
7.5 (High)
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Ben Visness, Brian Grinstead, Christian Holler, Dimi Lee, Jens Stutte, Jim Mathies, John Schanck, Jon Coppeard, Karl Tomlinson, Maurice Dauer, Nika Layzell, Randell Jesup, Tom Schuster and the Mozilla Fuzzing Team
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CVE-2026-6786 (GCVE-0-2026-6786)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-22 03:56
VLAI?
EPSS
Title
Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150
Summary
Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
8.1 (High)
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Alex Franchuk, Andrew McCreight, Brian Grinstead, Christian Holler, Jan de Mooij, Maurice Dauer, Sebastian Hengst, Tom Schuster and the Mozilla Fuzzing Team
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CVE-2026-6761 (GCVE-0-2026-6761)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-23 03:56
VLAI?
EPSS
Title
Privilege escalation in the Networking component
Summary
Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
kiyong
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CVE-2026-2781 (GCVE-0-2026-2781)
Vulnerability from cvelistv5 – Published: 2026-02-24 13:33 – Updated: 2026-04-21 12:40
VLAI?
EPSS
Title
Integer overflow in the Libraries component in NSS
Summary
Integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, Thunderbird 140.8, and Firefox ESR 115.35.
Severity ?
8.8 (High)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.8 , ≤ 140.* (rpm) Unaffected: 148 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Clay Ver Valen
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CVE-2026-6752 (GCVE-0-2026-6752)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Incorrect boundary conditions in the WebRTC component
Summary
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.3 (High)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
jmwebdevelopement
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CVE-2026-6772 (GCVE-0-2026-6772)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Incorrect boundary conditions in the Libraries component in NSS
Summary
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.5 (High)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
sseehra
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CVE-2026-6760 (GCVE-0-2026-6760)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:34
VLAI?
EPSS
Title
Mitigation bypass in the Networking: Cookies component
Summary
Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
9.8 (Critical)
CWE
- CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Richard Belisle
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CVE-2026-6782 (GCVE-0-2026-6782)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-22 15:03
VLAI?
EPSS
Title
Information disclosure in the IP Protection component
Summary
Information disclosure in the IP Protection component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
7.5 (High)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Yuki Umemura
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CVE-2026-6758 (GCVE-0-2026-6758)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:06
VLAI?
EPSS
Title
Use-after-free in the JavaScript: WebAssembly component
Summary
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
7.5 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Evyatar Ben Asher, Keane Lucas, Nicholas Carlini, Newton Cheng, Daniel Freeman, Alex Gaynor, and Joel Weinberger using Claude from Anthropic
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CVE-2026-6778 (GCVE-0-2026-6778)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Invalid pointer in the Audio/Video: Playback component
Summary
Invalid pointer in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
5.3 (Medium)
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
chanhokim
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CVE-2026-33626 (GCVE-0-2026-33626)
Vulnerability from cvelistv5 – Published: 2026-04-20 20:29 – Updated: 2026-04-21 19:50
VLAI?
EPSS
Title
LMDeploy Vulnerable to Server-Side Request Forgery (SSRF) via Vision-Language Image Loading
Summary
LMDeploy is a toolkit for compressing, deploying, and serving large language models. Versions prior to 0.12.3 have a Server-Side Request Forgery (SSRF) vulnerability in LMDeploy's vision-language module. The `load_image()` function in `lmdeploy/vl/utils.py` fetches arbitrary URLs without validating internal/private IP addresses, allowing attackers to access cloud metadata services, internal networks, and sensitive resources. Version 0.12.3 patches the issue.
Severity ?
7.5 (High)
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
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CVE-2026-6781 (GCVE-0-2026-6781)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-22 15:04
VLAI?
EPSS
Title
Denial-of-service in the Audio/Video: Playback component
Summary
Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
LatticeBased
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CVE-2026-6751 (GCVE-0-2026-6751)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Uninitialized memory in the Audio/Video: Web Codecs component
Summary
Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.3 (High)
CWE
- CWE-457 - Use of Uninitialized Variable
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Joren Afman
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CVE-2026-6775 (GCVE-0-2026-6775)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Incorrect boundary conditions in the WebRTC component
Summary
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
5.3 (Medium)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Nan Wang
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CVE-2026-6779 (GCVE-0-2026-6779)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Other issue in the JavaScript Engine component
Summary
Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
5.3 (Medium)
CWE
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Gary Kwong
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CVE-2026-6773 (GCVE-0-2026-6773)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Denial-of-service due to integer overflow in the Graphics: WebGPU component
Summary
Denial-of-service due to integer overflow in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
7.5 (High)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
Richard Belisle
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CVE-2026-6754 (GCVE-0-2026-6754)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:06
VLAI?
EPSS
Title
Use-after-free in the JavaScript Engine component
Summary
Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.5 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Xuehao Guo
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CVE-2026-6757 (GCVE-0-2026-6757)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:35
VLAI?
EPSS
Title
Invalid pointer in the JavaScript: WebAssembly component
Summary
Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
6.3 (Medium)
CWE
- CWE-824 - Access of Uninitialized Pointer
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Evyatar Ben Asher, Keane Lucas, Nicholas Carlini, Newton Cheng, Daniel Freeman, Alex Gaynor, and Joel Weinberger using Claude from Anthropic
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CVE-2026-6783 (GCVE-0-2026-6783)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component
Summary
Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
5.3 (Medium)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
crixer
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CVE-2026-6764 (GCVE-0-2026-6764)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-21 23:34
VLAI?
EPSS
Title
Incorrect boundary conditions in the DOM: Device Interfaces component
Summary
Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
6.5 (Medium)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Florian
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CVE-2026-6759 (GCVE-0-2026-6759)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:06
VLAI?
EPSS
Title
Use-after-free in the Widget: Cocoa component
Summary
Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.5 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Steven Michaud
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CVE-2026-6774 (GCVE-0-2026-6774)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-21 23:35
VLAI?
EPSS
Title
Mitigation bypass in the DOM: Security component
Summary
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
5.4 (Medium)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
lebr0nli
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CVE-2026-6746 (GCVE-0-2026-6746)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:08
VLAI?
EPSS
Title
Use-after-free in the DOM: Core & HTML component
Summary
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
7.5 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Evyatar Ben Asher, Keane Lucas, Nicholas Carlini, Newton Cheng, Daniel Freeman, Alex Gaynor, and Joel Weinberger using Claude from Anthropic
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CVE-2026-6756 (GCVE-0-2026-6756)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:35
VLAI?
EPSS
Title
Mitigation bypass in Firefox for Android
Summary
Mitigation bypass in Firefox for Android. This vulnerability was fixed in Firefox 150.
Severity ?
7.5 (High)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Credits
Hafiizh & Kang Ali
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CVE-2026-6780 (GCVE-0-2026-6780)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:41 – Updated: 2026-04-22 15:04
VLAI?
EPSS
Title
Denial-of-service in the Audio/Video: Playback component
Summary
Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity ?
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|||||||
|
|||||||||
Credits
LatticeBased
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CVE-2026-6762 (GCVE-0-2026-6762)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-22 15:34
VLAI?
EPSS
Title
Spoofing issue in the DOM: Core & HTML component
Summary
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
6.3 (Medium)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Farras Givari
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"value": "Spoofing issue in the DOM: Core \u0026 HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."
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CVE-2026-6750 (GCVE-0-2026-6750)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-04-24 13:44
VLAI?
EPSS
Title
Privilege escalation in the Graphics: WebRender component
Summary
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity ?
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
choeseyeong
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
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},
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}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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