CVE-2026-8091

critical
Published 2026-05-07 · Modified 2026-05-11
CVSS v3
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2
VIR risk
9.8

Description

Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2.

Predictions

Exploit likelihood
97%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-8091.html

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-8091

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-42/

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-39/

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-36/

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-33/

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-30/

OS impact

OSVersionStatusFixed in
debian debiansidfixed150.0-1
debian debianbookwormfixed140.10.1esr-1~deb12u1
debian debianbullseyefixed140.10.1esr-1~deb11u1
debian debianforkyfixed140.10.1esr-1
debian debiantrixiefixed140.10.1esr-1~deb13u1
suse slesaffected

Application impact

VendorProductVersionsFixed
mozillafirefox{"endExcluding":"115.35.2"}115.35.2
mozillathunderbird{"startIncluding":"140.0","endExcluding":"140.10.1"}140.10.1

References

CWEs

CWE-754

Verify integrity in audit chain (admin only). AS-IS.