Medium severityNVD Advisory· Published Oct 20, 2025· Updated Apr 15, 2026

CVE-2025-11679

Description

Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Warmcat/Libwebsocketsinferred2 versions
(expand)+ 1 more
- (no CPE)
- (no CPE)

Patches

Vulnerability mechanics

References

libwebsockets.org/git/libwebsockets/commitnvd
www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679nvd

News mentions

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cvss	0.260
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000