{"id":"CVE-2026-117540","state":"PUBLISHED","title":"svg-sanitizer before 1.1.0 Quadratic CPU-Exhaustion DoS via PHP-Tag Stripping Loop","description":"svg-sanitizer from 0.5.3 before 1.1.0 contains a denial of service vulnerability in Sanitizer::sanitize() that repeatedly rescans the whole input while stripping PHP tags. Unauthenticated attackers can upload SVGs with many overlapping PHP tag openers and closers, forcing quadratic preg_replace passes that exhaust worker CPU for minutes.","publishedAt":"2026-10-27T10:59:34.119Z","updatedAt":"2026-10-27T10:59:34.119Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["darylldoyle svg-sanitizer"],"affected":[{"vendor":"darylldoyle","product":"svg-sanitizer","defaultStatus":"unaffected","versions":[{"version":"0.5.3","status":"affected","lessThan":"1.1.0","versionType":"semver"},{"version":"1.1.0","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-2v7c-jx29-jprp","https://github.com/darylldoyle/svg-sanitizer/commit/9ba9001493f5da737759303f13bd965ebdaa778c","https://www.vulncheck.com/advisories/svg-sanitizer-before-1.1.0-quadratic-cpu-exhaustion-dos-via-php-tag-stripping-loop"],"weaknesses":["CWE-407"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/117xxx/CVE-2026-117540.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-117540","state":"PUBLISHED","datePublished":"2026-10-27T10:59:34.119Z","dateUpdated":"2026-10-27T10:59:34.119Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-27T10:33:39.046Z"},"containers":{"cna":{"title":"svg-sanitizer before 1.1.0 Quadratic CPU-Exhaustion DoS via PHP-Tag Stripping Loop","descriptions":[{"lang":"en","value":"svg-sanitizer from 0.5.3 before 1.1.0 contains a denial of service vulnerability in Sanitizer::sanitize() that repeatedly rescans the whole input while stripping PHP tags. Unauthenticated attackers can upload SVGs with many overlapping PHP tag openers and closers, forcing quadratic preg_replace passes that exhaust worker CPU for minutes."}],"affected":[{"vendor":"darylldoyle","product":"svg-sanitizer","defaultStatus":"unaffected","versions":[{"version":"0.5.3","status":"affected","lessThan":"1.1.0","versionType":"semver"},{"version":"1.1.0","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-2v7c-jx29-jprp","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-2v7c-jx29-jprp)"},{"url":"https://github.com/darylldoyle/svg-sanitizer/commit/9ba9001493f5da737759303f13bd965ebdaa778c","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/svg-sanitizer-before-1.1.0-quadratic-cpu-exhaustion-dos-via-php-tag-stripping-loop","name":"VulnCheck Advisory: svg-sanitizer before 1.1.0 Quadratic CPU-Exhaustion DoS via PHP-Tag Stripping Loop","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-407","lang":"en","description":"Inefficient Algorithmic Complexity","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-27T10:59:34.119Z"},"datePublic":"2026-10-19T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:svg-sanitizer_project:svg-sanitizer:*:*:*:*:*:*:*:*","versionStartIncluding":"0.5.3","versionEndExcluding":"1.1.0"}]}]}],"credits":[{"lang":"en","value":"AlpetGexha","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}}