Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') Affecting Firefox package, versions [,159)
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-UNMANAGED-FIREFOX-21755534
- published27 Oct 2026
- disclosed27 Oct 2026
- creditUnknown
Introduced: 27 Oct 2026
NewCVE-2026-117999 (opens in a new tab)How to fix?
Upgrade Firefox to version 159 or higher.
Overview
Affected versions of this package are vulnerable to Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') due to a race condition in the IPC component. An attacker can cause unexpected behavior or potentially execute unauthorized actions by exploiting timing issues during inter-process communication.