Out-of-bounds Write Affecting libwebsockets package, versions [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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Test your applications- Snyk IDSNYK-CONAN-LIBWEBSOCKETS-13645015
- published21 Oct 2025
- disclosed20 Oct 2025
- creditUnknown
Introduced: 20 Oct 2025
NewCVE-2025-11680 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write via the lws_upng_decode function when the WS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used. An attacker can cause a crash or potentially execute arbitrary code by enticing a user to visit a malicious website containing a crafted PNG file with a large width value, leading to an integer overflow that affects heap allocation size.
Note:
This is only exploitable if the LWS_WITH_UPNG flag is enabled and the HTML display stack is in use.