Heap-based Buffer Overflow Affecting Firefox-ESR package, versions [,140.9.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Mar 2026
- disclosed24 Mar 2026
- creditAtte Kettunen
Introduced: 24 Mar 2026
CVE-2026-4695 (opens in a new tab)How to fix?
Upgrade Firefox-ESR to version 140.9.0 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow due to improper handling of boundary conditions in the Web Codecs component. An attacker can cause unexpected behavior or potentially execute arbitrary code by providing specially crafted audio or video data.