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CVE-2025-14327VulnerabilityPublished Updated

Red Hat Security Advisory: thunderbird security update

Affects Red Hat thunderbirdSource GCVE Database

0
Authoritative record:CVE-2025-14327· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in Red Hat package updates : patch Red Hat thunderbird soon.

Data as of 26 Oct 2026, 09:15 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 140.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Product Security Red HatAffected
  • Red Hat
  • Red Hat Enterprise Linux
  • Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream E4S (v.8.6)
  • Red Hat Enterprise Linux AppStream TUS (v.8.6)
Fixed in–

AI-suggested

An official security update for Thunderbird is available for Red Hat Enterprise Linux 8.6 variants (AUS, E4S, TUS, and SAP Solutions). Users should apply the Thunderbird update version 140.7.0-1.el8_6 or later as provided by Red Hat to remediate these vulnerabilities. Refer to the Red Hat advisory RHSA-2026:1487 and the update instructions at https://access.redhat.com/articles/11258 for detailed patching guidance.

Description

Multiple security vulnerabilities affecting Mozilla Thunderbird have been addressed in a Red Hat Enterprise Linux 8.6 update. These include spoofing, use-after-free, memory safety bugs, sandbox escapes, information disclosure, mitigation bypass, and clickjacking issues across various components such as Downloads Panel, JavaScript engine, Graphics, IPC, Networking, DOM, and PDF Viewer. The update fixes these issues in Thunderbird ESR 140.7 and Thunderbird 147. The advisory covers Red Hat Enterprise Linux 8.6 variants including AUS, E4S, and TUS. Users are advised to apply the provided security update to remediate these vulnerabilities.

References

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