CVE-2026-8954
Description
Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Incorrect boundary conditions and integer overflow in the Audio/Video component of Firefox and Thunderbird could lead to memory corruption; fixed in versions 151 and 140.11.
Vulnerability
An incorrect boundary condition combined with an integer overflow in the Audio/Video component of Firefox and Thunderbird could lead to memory corruption. Affected versions include Firefox before 151, Firefox ESR before 140.11, Thunderbird before 151, and Thunderbird before 140.11 [1][2][3][4].
Exploitation
An attacker would need to convince a user to visit a malicious webpage or interact with crafted media content. In Thunderbird, scripting is disabled by default when reading mail, so exploitation via email is not possible; however, in browser or browser-like contexts the vulnerability is reachable [2][3].
Impact
Successful exploitation could lead to memory corruption, potentially allowing an attacker to execute arbitrary code or cause a denial of service. The impact is rated moderate by Mozilla [1][2][3][4].
Mitigation
The vulnerability is fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11, all released on May 19, 2026. Users should update to these versions. No workarounds are available [1][2][3][4].
AI Insight generated on May 21, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
3- Range: <140.11
- Range: <140.11
- Range: <151
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- www.mozilla.org/security/advisories/mfsa2026-46/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-48/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-50/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-51/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
0No linked articles in our index yet.