{"id":"CVE-2025-11680","title":"Out-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when …","summary":"Out-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when …","severity":"none","cwe":["CWE-787"],"published":"2025-10-20","updated":"2026-09-30","sourceUpdated":"2026-09-30T23:10:00.237","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-11680","references":[{"url":"https://libwebsockets.org/git/libwebsockets/commit?id=2b715249f39291c86443b969a1088d59b6a89b78","label":"prodsec@nozominetworks.com"},{"url":"https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11680","label":"prodsec@nozominetworks.com"}],"tags":["nvd"],"epss":0.00394,"epssPercentile":0.31102,"ingestedAt":"2026-09-30T23:29:32.435Z","slug":"CVE-2025-11680","body":"## Overview\n\nOut-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write 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 width value that causes an integer overflow which value is used for determining the size of a heap allocation.\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":[]}