Red Hat Security Advisory: firefox security update
Affects Red Hat firefoxSource GCVE Database
Mentioned vulnerabilities
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
- 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:LExploitation evidence
Disclosed: evidence found.
CVE published 7 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Product Security Red Hat | Affected
| Fixed in
|
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
- access.redhat.com/errata/RHSA-2026:25015 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2467706 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2467708 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2467709 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25015.json (opens in a new tab)