Out-of-bounds Read Affecting Firefox package, versions [,149.0.0)
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
- creditUnknown
Introduced: 24 Mar 2026
CVE-2026-4699 (opens in a new tab)How to fix?
Upgrade Firefox to version 149.0.0 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read due to improper handling of boundary conditions in the Layout: Text and Fonts component. An attacker can cause unexpected behavior or potentially execute arbitrary code by supplying specially crafted input that triggers the flaw.