{"id":"CVE-2025-11679","aliases":["BELL-CVE-2025-11679","DEBIAN-CVE-2025-11679","EUVD-2025-35056","GHSA-q5q2-4x99-gg9p","UBUNTU-CVE-2025-11679"],"status":"published","title":"Out-of-bounds Read in libwebsockets PNG parsing","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":{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00394,"percentile":0.34063,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2025-10-20T13:58:31Z","modified":"2026-10-08T22:10:00Z","products":[{"vendor":"warmcat","product":"libwebsockets"}],"references":[{"url":"https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101","tags":["patch","vendor-advisory","report"]},{"url":"https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679","tags":["third-party-advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11679"},{"url":"https://github.com/advisories/GHSA-q5q2-4x99-gg9p"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2025-11679","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-11679","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-11679","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-11679","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2025-11679","title":"Out-of-bounds Read in libwebsockets PNG parsing","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.","status":"published","published":"2025-10-20T13:58:31.286Z","modified":"2025-10-20T14:03:41.592Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:32:50.872559Z"}],"euvd":[{"id":"EUVD-2025-35056","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.","status":"published","published":"2025-10-20T13:58:31Z","modified":"2025-10-20T14:03:41Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T20:31:29.921127Z"}],"ghsa":[{"id":"GHSA-q5q2-4x99-gg9p","title":"Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the...","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.","status":"published","published":"2025-10-20T15:30:25Z","modified":"2025-10-20T15:30:37Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:04:01.823376Z"}],"nvd":[{"id":"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.","status":"published","published":"2025-10-20T14:15:40.353Z","modified":"2026-10-08T22:10:00.563Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:11:39.069866Z"}],"osv":[{"id":"DEBIAN-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.","status":"withdrawn","published":"2025-10-20T14:15:40Z","modified":"2025-11-04T14:19:38.136703Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:45.102284Z"},{"id":"UBUNTU-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.","status":"withdrawn","published":"2025-10-20T14:15:00Z","modified":"2026-02-12T06:33:14.335283Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:55:20.144818Z"},{"id":"BELL-CVE-2025-11679","title":"CVE-2025-11679 does not affect BellSoft software","status":"withdrawn","published":"2025-10-23T06:06:32.578823Z","modified":"2026-06-19T07:15:04.321162569Z","updated_at":"2026-11-02T15:28:21.227396Z"}]}}