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VulnerabilityPublished Updated

CVE-2025-11709: A compromised web process was able to trigger out of bounds reads and writes in a more privileged

Source GCVE Database

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Authoritative record:CVE-2025-11709· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical · fixed in 144 : patch affected systems as a priority.

Data as of 29 Oct 2026, 23:56 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 144, 140.4, 115.29
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Oct 2025

  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 29 Oct 2026.

What to do

AI-suggested

Mozilla has released official fixes for this vulnerability in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. Users and administrators should update to these versions or later to remediate the vulnerability. No additional mitigation steps are required beyond applying these updates.

Description

CVE-2025-11709 is a critical vulnerability in Firefox and Thunderbird where a compromised web process can cause out-of-bounds reads and writes in a more privileged process by manipulating WebGL textures. This flaw affects Firefox versions prior to 144 and Firefox ESR versions prior to 115.29 and 140.4, as well as Thunderbird versions prior to 144 and 140.4. The vulnerability allows potential arbitrary code execution due to memory corruption. Mozilla has released fixes in Firefox 144, Firefox ESR 115.29, and Firefox ESR 140.4, along with corresponding Thunderbird versions.

References

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