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CVE-2026-109736VulnerabilityPublished

Mozilla Firefox und Thunderbird: Mehrere Schwachstellen

Affects Bundesamt für Sicherheit in der Informationstechnik MozillaSource GCVE Database

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Authoritative record:CVE-2026-109736· High 8.1

Not known to be exploited · CVSS 8.1 High.

Data as of 12 Nov 2026, 12:06 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.18.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Oct 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 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

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