SUSE-SU-2026:1379-1

Vulnerability from csaf_suse - Published: 2026-04-16 08:42 - Updated: 2026-04-16 08:42
Summary
Security update for MozillaThunderbird
Severity
Important
Notes
Title of the patch: Security update for MozillaThunderbird
Description of the patch: This update for MozillaThunderbird fixes the following issues: - Update to 149.0.2 and 140.9.1esr (bsc#1261663). - CVE-2026-5731: Memory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2. - CVE-2026-5732: Incorrect boundary conditions, integer overflow in the Graphics: Text component. - CVE-2026-5734: Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2.
Patchnames: SUSE-2026-1379,SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-1379,SUSE-SLE-Product-WE-15-SP7-2026-1379
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-5731
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-5732
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2026-5734
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
References
To clipboard 

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  "vulnerabilities": [
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          "text": "Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 149.0.2, Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.",
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      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-16T08:42:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-5731"
    },
    {
      "cve": "CVE-2026-5732",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-5732"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-5732",
          "url": "https://www.suse.com/security/cve/CVE-2026-5732"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1261663 for CVE-2026-5732",
          "url": "https://bugzilla.suse.com/1261663"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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      "threats": [
        {
          "category": "impact",
          "date": "2026-04-16T08:42:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-5732"
    },
    {
      "cve": "CVE-2026-5734",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-5734"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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      "references": [
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          "category": "external",
          "summary": "CVE-2026-5734",
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        },
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          "category": "external",
          "summary": "SUSE Bug 1261663 for CVE-2026-5734",
          "url": "https://bugzilla.suse.com/1261663"
        }
      ],
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          ]
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      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
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          },
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            "SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-common-140.9.1-150200.8.266.1.ppc64le",
            "SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-common-140.9.1-150200.8.266.1.s390x",
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            "SUSE Linux Enterprise Module for Package Hub 15 SP7:MozillaThunderbird-translations-other-140.9.1-150200.8.266.1.ppc64le",
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            "SUSE Linux Enterprise Workstation Extension 15 SP7:MozillaThunderbird-140.9.1-150200.8.266.1.x86_64",
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-16T08:42:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-5734"
    }
  ]
}


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Tags
Taxonomy of the tags.




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.



Detection rules are retrieved from Rulezet.