Reachable Assertion Affecting Firefox-ESR package, versions [,140.9)
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-2026-4704 (opens in a new tab)How to fix?
Upgrade Firefox-ESR to version 140.9 or higher.
Overview
Affected versions of this package are vulnerable to Reachable Assertion through the Signaling process. An attacker can cause the application to become unresponsive or crash by sending specially crafted signaling messages.