{"id":"CVE-2022-23514","aliases":["GHSA-486f-hjj9-9vhh"],"url":"https://o3.security/vulnerability/CVE-2022-23514","summary":"Inefficient Regular Expression Complexity in Loofah","details":"## Summary\n\nLoofah `< 2.19.1` contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption.\n\n\n## Mitigation\n\nUpgrade to Loofah `>= 2.19.1`.\n\n\n## Severity\n\nThe Loofah maintainers have evaluated this as [High Severity 7.5 (CVSS3.1)](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).\n\n\n## References\n\n- [CWE - CWE-1333: Inefficient Regular Expression Complexity (4.9)](https://cwe.mitre.org/data/definitions/1333.html)\n- https://hackerone.com/reports/1684163\n\n\n## Credit\n\nThis vulnerability was responsibly reported by @ooooooo-q (https://github.com/ooooooo-q).","published":"2022-12-14T13:19:25.943Z","modified":"2026-08-12T03:51:22.585685244Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.01686,"percentile":0.75899,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"loofah","fixedVersion":"2.19.1"}],"fix":{"url":"https://github.com/flavorjones/loofah/commit/a6e0a1ab90675a17b1b2be189129d94139e4b143","label":"flavorjones/loofah@a6e0a1a"},"references":[{"type":"WEB","url":"https://hackerone.com/reports/1684163"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/09/msg00011.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00044.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23514.json"},{"type":"ADVISORY","url":"https://github.com/flavorjones/loofah/security/advisories/GHSA-486f-hjj9-9vhh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23514"},{"type":"WEB","url":"https://github.com/flavorjones/loofah/commit/a6e0a1ab90675a17b1b2be189129d94139e4b143"},{"type":"PACKAGE","url":"https://github.com/flavorjones/loofah"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/loofah/CVE-2022-23514.yml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:22.585685244Z"}}