{"id":"CVE-2026-121443","title":"svg-sanitizer from 1.1.0 before 1.1.1 Denial of Service via Unclosed Tag","summary":"svg-sanitizer from 1.1.0 before 1.1.1 contains a denial of service vulnerability that allows remote attackers to crash requests by submitting SVG input ending inside an unclosed tag. Attackers can upload truncated input like a single '<'…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-248"],"vendor":"darylldoyle","product":"svg-sanitizer","affected":["svg-sanitizer >= 1.1.0 < 1.1.1"],"published":"2026-11-03","updated":"2026-11-03","sourceUpdated":"2026-11-03T14:28:33.308Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121443","references":[{"url":"https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-f7cw-vfxq-7ph2","label":"GitHub Security Advisory (GHSA-f7cw-vfxq-7ph2)"},{"url":"https://www.vulncheck.com/advisories/svg-sanitizer-from-1.1.0-before-1.1.1-denial-of-service-via-unclosed-tag","label":"VulnCheck Advisory: svg-sanitizer from 1.1.0 before 1.1.1 Denial of Service via Unclosed Tag"}],"tags":["cve.org"],"epss":0.00301,"epssPercentile":0.22936,"ingestedAt":"2026-11-05T19:30:42.970Z","slug":"CVE-2026-121443","body":"## Overview\n\nsvg-sanitizer from 1.1.0 before 1.1.1 contains a denial of service vulnerability that allows remote attackers to crash requests by submitting SVG input ending inside an unclosed tag. Attackers can upload truncated input like a single '<' to trigger an uncaught ValueError from strpos() in hasElementWithTooManyAttributes() or hasInternalDtdSubset() on PHP 8, failing the request.\n\n## Affected\n\n- `svg-sanitizer >= 1.1.0 < 1.1.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}