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CVE-2025-14327VulnerabilityPublished Updated

Red Hat Security Advisory: firefox security update

Affects Red Hat firefoxSource 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 firefox to 140.8.0 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 140.8.0
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 firefox to 140.8.0.

Affected software

ProductAffectedFixed in
Red Hat Product Security Red HatAffected
  • >=140.7.0 <140.8.0
  • Red Hat
  • Red Hat Enterprise Linux
  • Red Hat Enterprise Linux AppStream (v. 8)
  • src
  • firefox-0:140.7.0-1.el8_10.src
Fixed in
  • 140.8.0

AI-suggested

Red Hat has released an official security update for Firefox ESR 140.7 on Red Hat Enterprise Linux 8 that addresses all listed vulnerabilities. Users should apply the update promptly by following Red Hat's update instructions at https://access.redhat.com/articles/11258. This update is the official fix and mitigates the vulnerabilities described. No additional mitigation steps are required beyond applying the update.

Description

A security update for Mozilla Firefox has been released by Red Hat to address multiple vulnerabilities including spoofing, use-after-free, memory safety bugs, sandbox escapes, information disclosure, mitigation bypass, and clickjacking issues. These vulnerabilities affect Firefox ESR 140.7 and related Thunderbird versions on Red Hat Enterprise Linux 8. The update fixes issues in components such as Downloads Panel, JavaScript engine, Graphics, IPC, Networking, DOM security, PDF Viewer, and CanvasWebGL. The update is rated as important by Red Hat Product Security and addresses 13 CVEs.

References

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