Out-of-Bounds Affecting Firefox-ESR package, versions [,115.33)[128.0,140.8)
Threat Intelligence
EPSS
0.59% (48th percentile)
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- published26 Feb 2026
- disclosed24 Feb 2026
- creditUnknown
Introduced: 24 Feb 2026
CVE-2026-2757 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade Firefox-ESR to version 115.33, 140.8 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-Bounds in the WebRTC Audio/Video process due to incorrect boundary conditions. An attacker can execute arbitrary code or cause a denial of service by enticing a user to interact with malicious audio or video streams.