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CVE-2026-8090VulnerabilityPublished Updated

Red Hat Security Advisory: firefox security update

Affects Red Hat firefoxSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-8090· High 7.3

Not known to be exploited · CVSS 7.3 High · fixed in Red Hat package updates : patch Red Hat firefox soon.

Data as of 6 Nov 2026, 03:20 UTC

CVSS 3.1 base score
7.3High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 115.35.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: 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 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Product Security Red HatAffected
  • <150.0.2
  • <140.10.2
Fixed in
  • 150.0.2
  • 140.10.2

AI-suggested

Red Hat has released updated Firefox packages (e.g., firefox-140.10.2-1.el8_6) for Red Hat Enterprise Linux 8.6 Extended Life Cycle and AUS variants. Users should apply these official updates to remediate the vulnerabilities. Detailed update instructions are available at Red Hat's knowledge base article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the provided security update.

Description

Red Hat has issued a security advisory for Firefox addressing multiple vulnerabilities, including a use-after-free flaw in the DOM networking component (CVE-2026-8090), memory safety bugs, and an issue in the WebRTC component. These vulnerabilities affect Firefox ESR versions 115.35.2, 140.10.2, and Firefox 150.0.2. The update is rated as important by Red Hat and fixes these security issues in Red Hat Enterprise Linux 8.6 variants.

References

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