CVE-2024-4771 Affecting firefox-esr package, versions <126-r0
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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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-FIREFOXESR-17764072
- published1 Jul 2026
- disclosed14 May 2024
Introduced: 14 May 2024
CVE-2024-4771 (opens in a new tab)How to fix?
Upgrade Chainguard firefox-esr to version 126-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
A memory allocation check was missing which would lead to a use-after-free if the allocation failed. This could have triggered a crash or potentially be leveraged to achieve code execution. This vulnerability affects Firefox < 126.