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CVE-2026-3889VulnerabilityPublished Updated

SUSE · security update for thunderbird

Affects SUSESource GCVE Database

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Authoritative record:CVE-2026-3889· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium · patch available : update SUSE when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
SUSE Product Security Team SUSEAffected
  • <140.9
Fixed in
  • 140.9

AI-suggested

An official security update for Thunderbird is available from Red Hat for Red Hat Enterprise Linux 9, addressing all listed vulnerabilities. Users should apply the update promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. No additional mitigation actions are indicated beyond applying the official patch.

Description

Multiple security vulnerabilities have been identified and addressed in Mozilla Thunderbird, including use-after-free, memory safety bugs, privilege escalation, sandbox escapes, incorrect boundary conditions, integer overflows, race conditions, information disclosure, denial-of-service, spoofing, and mitigation bypass issues. These vulnerabilities affect various components such as the JavaScript engine, graphics, audio/video, WebRTC, XPCOM, CSS parsing, layout, networking, and IMAP parsing. Red Hat has issued an important security update for Thunderbird in Red Hat Enterprise Linux 9 to address these issues.

References

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