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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, 10:12 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
  • SUSE
  • x86_64
  • firefox-0:140.7.0-1.el9_6.x86_64
  • firefox-x11-0:140.7.0-1.el9_6.x86_64
  • SUSE Linux Enterprise
  • Red Hat
  • Red Hat Enterprise Linux
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • src
  • firefox-0:140.7.0-1.el9_6.src
Fixed in
  • 140.8.0

AI-suggested

An official security update is available from Red Hat for Red Hat Enterprise Linux 9.6 Extended Update Support, including Firefox ESR 140.7 and Thunderbird ESR 140.7 packages that address these vulnerabilities. Users and administrators should apply the update promptly following Red Hat's published guidance at https://access.redhat.com/articles/11258. No additional mitigations are indicated beyond applying the provided patches.

Description

Multiple security vulnerabilities have been identified and fixed in Mozilla Firefox and Thunderbird as part of a Red Hat security advisory for Red Hat Enterprise Linux 9.6 Extended Update Support. The issues include spoofing, use-after-free, memory safety bugs, sandbox escapes, information disclosure, mitigation bypasses, and clickjacking across various Firefox components such as Downloads Panel, JavaScript engine, Graphics, IPC, Networking, DOM, and PDF Viewer. These vulnerabilities affect Firefox ESR 140.7 and Thunderbird ESR 140.7, as well as Firefox 147 and Thunderbird 147. The update addresses these issues to improve security and stability.

References

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