CVE-2026-8091

critical

Published 2026-05-07 · Modified 2026-05-11

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CVSS v3

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4 NEW

—

not yet in upstream

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

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`140.10.1esr-1~deb13u1`
sid	Fixed	`150.0-1`
forky	Fixed	`140.10.1esr-1`
bullseye	Fixed	`140.10.1esr-1~deb11u1`
bookworm	Fixed	`140.10.1esr-1~deb12u1`

Application impact

Vendor	Product	Versions	Fixed
mozilla	firefox	`{"endExcluding":"115.35.2"}`	`115.35.2`
mozilla	thunderbird	`{"startIncluding":"140.0","endExcluding":"140.10.1"}`	`140.10.1`

References

CWEs

CWE-754

Community-verified mitigations for this CVE will appear above when contributors publish them.

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