CVE-2025-11679 – Out-of-bounds Read in libwebsockets PNG parsing

CVE ID : CVE-2025-11679

Published : Oct. 20, 2025, 2:15 p.m. | 26 minutes ago

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.

Severity: 5.9 | MEDIUM

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