Reachable Assertion Affecting wpe_webkit package, versions [,2.50.2)
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-WPEWEBKIT-14101760
- published23 Nov 2025
- disclosed20 Nov 2025
- creditGoogle Big Sleep
Introduced: 20 Nov 2025
NewCVE-2025-43430 (opens in a new tab)How to fix?
Upgrade wpe_webkit to version 2.50.2 or higher.
Overview
Affected versions of this package are vulnerable to Reachable Assertion via improper handling of try block implicit slots in the makeStackMap function in the WebAssembly BBQ JIT compiler. An attacker can cause an unexpected process crash by processing maliciously crafted WebAssembly content that triggers On-Stack Replacement with try blocks, where the try block's implicit exception slot overlaps with argument locations, causing debug assertions to fire.