Skip to main content
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.8.8)
  • Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • src
Fixed in
  • 140.7

AI-suggested

Security updates fixing these vulnerabilities are available and should be applied promptly. Red Hat has released updated packages for affected versions, including Thunderbird ESR 140.7 and Firefox ESR 140.7. Users should follow the vendor's update instructions as detailed in the Red Hat advisory (RHSA-2026:1462). No additional mitigation steps are indicated beyond applying the official patches.

Description

Multiple high severity security vulnerabilities affecting Mozilla Thunderbird ESR 140.x series have been addressed in recent updates. These include use-after-free, sandbox escape, integer overflow, mitigation bypass, privilege escalation, information disclosure, and spoofing issues across various components such as JavaScript engine, graphics, networking, DOM, audio/video, and IPC. The vendor advisory from Red Hat confirms the availability of security updates for affected versions.

References

Community reviews

Loading reviews…