{"cve":"CVE-2022-21653","nvd":{"published":"2022-01-05T21:15:07.890","modified":"2026-06-17T04:26:41.493","status":"Modified","description":"Jawn is an open source JSON parser. Extenders of the `org.typelevel.jawn.SimpleFacade` and `org.typelevel.jawn.MutableFacade` who don't override `objectContext()` are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library. `jawn-parser-1.3.1` fixes this issue and users are advised to upgrade. For users unable to upgrade override `objectContext()` to use a collision-safe collection.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-326","CWE-400"],"references":["https://github.com/typelevel/jawn/pull/390","https://github.com/typelevel/jawn/security/advisories/GHSA-vc89-hccf-rq55","https://github.com/typelevel/jawn/pull/390","https://github.com/typelevel/jawn/security/advisories/GHSA-vc89-hccf-rq55"],"products":["typelevel:jawn"],"source":"nvd","synced_at":"2026-10-19T21:26:33.761856376+00:00"},"epss":{"cve":"CVE-2022-21653","score":0.0082,"percentile":0.57256,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vc89-hccf-rq55","url":"https://osv.dev/vulnerability/GHSA-vc89-hccf-rq55","summary":"Hash collision in typelevel jawn","modified":"2025-12-16T22:56:31.776825Z","packages":[{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_0.25","purl":"pkg:maven/org.typelevel/jawn-parser_0.25","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parserg","purl":"pkg:maven/org.typelevel/jawn-parserg","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_0.27","purl":"pkg:maven/org.typelevel/jawn-parser_0.27","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.10","purl":"pkg:maven/org.typelevel/jawn-parser_2.10","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.11","purl":"pkg:maven/org.typelevel/jawn-parser_2.11","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.12","purl":"pkg:maven/org.typelevel/jawn-parser_2.12","ranges":["<1.3.2"],"fixed":["1.3.2"]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.13","purl":"pkg:maven/org.typelevel/jawn-parser_2.13","ranges":["<1.3.2"],"fixed":["1.3.2"]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.13.0-M5","purl":"pkg:maven/org.typelevel/jawn-parser_2.13.0-M5","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.13.0-RC1","purl":"pkg:maven/org.typelevel/jawn-parser_2.13.0-RC1","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.13.0-RC2","purl":"pkg:maven/org.typelevel/jawn-parser_2.13.0-RC2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_2.13.0-RC3","purl":"pkg:maven/org.typelevel/jawn-parser_2.13.0-RC3","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_3","purl":"pkg:maven/org.typelevel/jawn-parser_3","ranges":["<1.3.2"],"fixed":["1.3.2"]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_3.0.0-M1","purl":"pkg:maven/org.typelevel/jawn-parser_3.0.0-M1","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_3.0.0-M2","purl":"pkg:maven/org.typelevel/jawn-parser_3.0.0-M2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_3.0.0-M3","purl":"pkg:maven/org.typelevel/jawn-parser_3.0.0-M3","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_3.0.0-RC1","purl":"pkg:maven/org.typelevel/jawn-parser_3.0.0-RC1","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_3.0.0-RC2","purl":"pkg:maven/org.typelevel/jawn-parser_3.0.0-RC2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"org.typelevel:jawn-parser_3.0.0-RC3","purl":"pkg:maven/org.typelevel/jawn-parser_3.0.0-RC3","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}