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CVE-2025-14327VulnerabilityPublished Updated

Red Hat Security Advisory: thunderbird security update

Affects Red Hat thunderbirdSource GCVE Database

0

Mentioned vulnerabilities

Authoritative record:CVE-2025-14327· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat thunderbird to 140.7 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

Upgrade Red Hat thunderbird to 140.7.

Affected software

ProductAffectedFixed in
Red Hat Product Security Red HatAffected
  • >=140.0 <140.7
  • Red Hat
  • Red Hat Enterprise Linux
  • Red Hat Enterprise Linux AppStream E4S (v.9.0)
  • src
  • thunderbird-0:140.7.0-1.el9_0.src
Fixed in
  • 140.7

AI-suggested

Red Hat has released updated Thunderbird packages (version 140.7.0-1.el9_0) for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions that address these vulnerabilities. Users should apply these official updates promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. Since this is an official fix, applying the update fully mitigates the described vulnerabilities.

Description

A security update for Mozilla Thunderbird distributed by Red Hat addresses multiple vulnerabilities including spoofing, use-after-free, memory safety bugs, sandbox escapes, information disclosure, mitigation bypass, and clickjacking issues. These vulnerabilities affect Thunderbird ESR 140.7 and Thunderbird 147 versions as packaged for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions. The update fixes 13 CVEs related to Firefox and Thunderbird components. The advisory rates the security impact as Important. No known exploits in the wild have been reported at this time.

References

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