Integer Overflow or Wraparound Affecting Firefox-ESR package, versions [,115.34.0)[116.0.0,140.9.0)
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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Start learning- Snyk IDSNYK-UNMANAGED-FIREFOXESR-15762893
- published24 Mar 2026
- disclosed24 Mar 2026
- creditSajeeb Lohani
Introduced: 24 Mar 2026
CVE-2026-4689 (opens in a new tab)How to fix?
Upgrade Firefox-ESR to version 115.34.0, 140.9.0 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound in the XPCOM component due to incorrect boundary conditions and integer overflow. An attacker can execute code outside the intended sandbox by exploiting the overflow to escape the restricted environment.