Firefox ESR AV Playback boundary flaw before 140.10.2
CVE-2026-8091 Published on May 7, 2026
Incorrect boundary conditions in the Audio/Video: Playback component
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.
Vulnerability Analysis
CVE-2026-8091 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Improper Check for Unusual or Exceptional Conditions
The software does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the software.
Products Associated with CVE-2026-8091
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Affected Versions
Mozilla Firefox:- Version 115.35.2, <= 115.* is unaffected.
- Version 140.10.1, <= 140.* is unaffected.
- Version 150, <= * is unaffected.
- Version 140.10.1, <= 140.* is unaffected.
- Version 150, <= * is unaffected.