Mozilla Firefox und Thunderbird: Mehrere Schwachstellen
Affects Bundesamt für Sicherheit in der Informationstechnik MozillaSource GCVE Database
Not known to be exploited · CVSS 8.1 High.
Data as of 12 Nov 2026, 12:06 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 8.1 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 13 Oct 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 12 Nov 2026.
What to do
AI-suggested
A fix is available in Firefox 160 and Firefox ESR 115.45. Users and administrators are strongly advised to update to these versions or later to mitigate these vulnerabilities.
Description
Multiple high-impact security vulnerabilities have been identified and fixed in Mozilla Firefox and Thunderbird. These include issues such as sandbox escapes, use-after-free bugs, incorrect boundary conditions, privilege escalations, and same-origin policy bypasses affecting various components like graphics, DOM, networking, audio/video, and layout. The vulnerabilities affect Firefox versions prior to 160 and Firefox ESR versions prior to 115.45. Fixes are available in Firefox 160 and Firefox ESR 115.45.
References
- wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-4515.json (opens in a new tab)
- wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-4515 (opens in a new tab)
- mozilla.org/en-US/security/advisories/mfsa2026-125/ (opens in a new tab)
- mozilla.org/en-US/security/advisories/mfsa2026-126/ (opens in a new tab)
- mozilla.org/en-US/security/advisories/mfsa2026-127/ (opens in a new tab)
- mozilla.org/en-US/security/advisories/mfsa2026-128/ (opens in a new tab)
- mozilla.org/en-US/security/advisories/mfsa2026-129/ (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2026-November/030536.html (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:98124 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:98128 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:99070 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:99111 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:99013 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:99110 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:99050 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:99510 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:99112 (opens in a new tab)