Firefox WebAudio Wrong boundary flaw before v148
CVE-2026-2773 Published on February 24, 2026
Incorrect boundary conditions in the Web Audio component
Incorrect boundary conditions in the Web Audio component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Vulnerability Analysis
CVE-2026-2773 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
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-2773 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-2773
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Affected Versions
Mozilla Firefox:- Version 115.33, <= 115.* is unaffected.
- Version 140.8, <= 140.* is unaffected.
- Version 148, <= * is unaffected.
- Version 140.8, <= 140.* is unaffected.
- Version 148, <= * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.