{"id":"CVE-2025-11679","title":"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, w…","summary":"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, w…","severity":"none","cwe":["CWE-125"],"published":"2025-10-20","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:10:00.563","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-11679","references":[{"url":"https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101","label":"prodsec@nozominetworks.com"},{"url":"https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679","label":"prodsec@nozominetworks.com"}],"tags":["nvd"],"epss":0.00394,"epssPercentile":0.31433,"ingestedAt":"2026-10-08T22:11:53.817Z","slug":"CVE-2025-11679","body":"## Overview\n\nOut-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}