{"schema_version":"1.7.3","id":"GHSA-3x8r-x6xp-q4vm","published":"2022-12-13T17:40:50Z","modified":"2025-11-04T17:02:06.796489Z","aliases":["CVE-2022-23516"],"summary":"Uncontrolled Recursion in Loofah","details":"## Summary\n\nLoofah `>= 2.2.0, < 2.19.1` uses recursion for sanitizing `CDATA` sections, making it susceptible to stack exhaustion and raising a `SystemStackError` exception.  This may lead to a denial of service through CPU resource consumption.\n\n\n## Mitigation\n\nUpgrade to Loofah `>= 2.19.1`.\n\nUsers who are unable to upgrade may be able to mitigate this vulnerability by limiting the length of the strings that are sanitized.\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-674: Uncontrolled Recursion (4.9)](https://cwe.mitre.org/data/definitions/674.html)","affected":[{"package":{"name":"loofah","ecosystem":"RubyGems","purl":"pkg:gem/loofah"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.19.1"}]}],"versions":["2.10.0","2.11.0","2.12.0","2.13.0","2.14.0","2.15.0","2.16.0","2.17.0","2.18.0","2.19.0","2.2.0","2.2.1","2.2.2","2.2.3","2.3.0","2.3.1","2.4.0","2.5.0","2.6.0","2.7.0","2.8.0","2.9.0","2.9.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/12/GHSA-3x8r-x6xp-q4vm/GHSA-3x8r-x6xp-q4vm.json"}}],"references":[{"type":"WEB","url":"https://github.com/flavorjones/loofah/security/advisories/GHSA-3x8r-x6xp-q4vm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23516"},{"type":"WEB","url":"https://github.com/flavorjones/loofah/commit/86f7f6364491b0099d215db858ecdc0c89ded040"},{"type":"PACKAGE","url":"https://github.com/flavorjones/loofah"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/loofah/CVE-2022-23516.yml"},{"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"}],"database_specific":{"cwe_ids":["CWE-674"],"github_reviewed":true,"github_reviewed_at":"2022-12-13T17:40:50Z","nvd_published_at":"2022-12-14T14:15:00Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}