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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 140.7 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 firefox 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 AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream E4S (v.8.6)
  • Red Hat Enterprise Linux AppStream TUS (v.8.6)
Fixed in
  • 140.7

AI-suggested

Red Hat has released official security updates for Firefox and Thunderbird addressing all listed vulnerabilities. Users of Red Hat Enterprise Linux 8.6 variants should apply the Firefox ESR 140.7 update (firefox-140.7.0-1.el8_6) and corresponding Thunderbird updates as provided by Red Hat. Detailed update instructions are available at https://access.redhat.com/articles/11258. Applying these updates mitigates the vulnerabilities. No additional vendor-recommended mitigations or workarounds are indicated in the advisory.

Description

A security update for Mozilla Firefox addresses 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 Firefox 147 versions as packaged for Red Hat Enterprise Linux 8.6 variants. The update fixes issues in components such as Downloads Panel, JavaScript engine, Graphics, IPC, Networking, DOM, and PDF Viewer. The vulnerabilities have been rated with an overall security impact of Important by Red Hat Product Security.

References

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