{"id":"CVE-2026-61846","summary":"Crass: Deeply nested CSS blocks and functions can trigger a SystemStackError or excessive memory usage","details":"Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification. Prior to 1.0.7, Crass recursively parses `CSS simple blocks and functions` without a depth guard. An attacker-controlled CSS value containing deeply nested blocks or functions can recurse until Ruby raises `SystemStackError`: stack level too deep, or cause excessive memory usage. Version 1.0.7 adds a configurable depth limit with a conservative default. This issue is fixed in version 1.0.7.","aliases":["GHSA-6jxj-px6v-747w"],"modified":"2026-11-01T02:47:39.003230534Z","published":"2026-10-30T18:43:25.373Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61846.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-674"]},"references":[{"type":"WEB","url":"https://github.com/rgrove/crass/releases/tag/v1.0.7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61846.json"},{"type":"ADVISORY","url":"https://github.com/rgrove/crass/security/advisories/GHSA-6jxj-px6v-747w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61846"},{"type":"FIX","url":"https://github.com/rgrove/crass/commit/cf68287356ec6e20d51cfc4a2d0c3912b7334e99"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rgrove/crass","events":[{"introduced":"0"},{"fixed":"cfd5daa3ce23cd7b2356acf90ecb7a02defe002c"},{"fixed":"cf68287356ec6e20d51cfc4a2d0c3912b7334e99"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"1.0.7"}]},{"source":"REFERENCES_COMMIT","range":[{"fixed":"cf68287356ec6e20d51cfc4a2d0c3912b7334e99"}]},{"original_tag":"v1.0.7","range":[{"fixed":"cfd5daa3ce23cd7b2356acf90ecb7a02defe002c"}],"source":"REFERENCES_TAG"}]}}],"versions":["v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.2.1","v0.2.0","v0.1.0","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-61846.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L"}]}