CVE & CISA-KEV CatalogNVD
CVE-2026-8091
CRITICAL9.8
CVSS v3
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.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
0.48%probability of exploitation in 30 days
37thpercentile
Low risk: more likely to be exploited than 37% of all known CVEs.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2029301
- https://www.mozilla.org/security/advisories/mfsa2026-30/
- https://www.mozilla.org/security/advisories/mfsa2026-33/
- https://www.mozilla.org/security/advisories/mfsa2026-36/
- https://www.mozilla.org/security/advisories/mfsa2026-39/
- https://www.mozilla.org/security/advisories/mfsa2026-42/
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-11.