Use-after-free in the Audio/Video: Web Codecs component

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-92005
StatePUBLISHED
Assignermozilla
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-15 13:16:48 UTC
Updated2026-09-17 21:17:53 UTC
DescriptionUse-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from ADP

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

EPSS: 0.001560000 probability, percentile 0.051800000 (date 2026-09-16)

Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mozilla Firefox unaffected 140.16 140.* rpm Not specified
CNA Mozilla Firefox unaffected 153.3 153.* rpm Not specified
CNA Mozilla Firefox unaffected 156 * rpm Not specified
CNA Mozilla Thunderbird unaffected 140.16 140.* rpm Not specified
CNA Mozilla Thunderbird unaffected 153.3 153.* rpm Not specified
CNA Mozilla Thunderbird unaffected 156 * rpm Not specified

References

ReferenceSourceLinkTags
bugzilla.mozilla.org/show_bug.cgi [email protected] bugzilla.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-96 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-94 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-95 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-93 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-92 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-90 [email protected] www.mozilla.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: [email protected] (en)

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