SUSE-SU-2026:0388-1
Vulnerability from csaf_suse - Published: 2026-02-05 11:14 - Updated: 2026-02-05 11:14Summary
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 Mozilla Thunderbird 140.7.1 MFSA 2026-08 (bsc#1257397):
- CVE-2026-0818: CSS-based exfiltration of the content from partially encrypted emails when allowing remote content
Patchnames: SUSE-2026-388,SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-388,SUSE-SLE-Product-WE-15-SP7-2026-388,openSUSE-SLE-15.6-2026-388
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
References
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"cve": "CVE-2026-0818",
"ids": [
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"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-0818"
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"notes": [
{
"category": "general",
"text": "When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird \u003c 147.0.1 and Thunderbird \u003c 140.7.1.",
"title": "CVE description"
}
],
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"threats": [
{
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"date": "2026-02-05T11:14:22Z",
"details": "moderate"
}
],
"title": "CVE-2026-0818"
}
]
}
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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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