{"cve":"CVE-2026-55771","nvd":{"published":"2026-07-13T20:16:48.453","modified":"2026-10-24T22:10:00.210","status":"Deferred","description":"CedarJava is an open source Java implementation of the Cedar policy language, used for fine-grained authorization decisions. In versions prior to 4.9.0, the EntityIdentifier.equals() has inverted null/self branches which could lead to incorrect equality comparisons. The EntityIdentifier.equals() method has inverted logic for null and self-reference checks, returning true for null comparisons and false for self-comparisons. This does not affect Cedar authorization decisions (computed in Rust from JSON), but could affect integrators who perform their own equality checks on entity identifiers. This issue has been fixed in version 4.9.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-94","CWE-697","CWE-843"],"references":["https://github.com/cedar-policy/cedar-java/security/advisories/GHSA-4r9r-4425-74p7"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:06.907763985+00:00"},"epss":{"cve":"CVE-2026-55771","score":0.00575,"percentile":0.47176,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-4r9r-4425-74p7","url":"https://osv.dev/vulnerability/GHSA-4r9r-4425-74p7","summary":"Cedar-Java has policy injection, type confusion, and incorrect equality comparison vulnerabilities","modified":"2026-08-12T05:15:07.376813034Z","packages":[{"ecosystem":"Maven","name":"com.cedarpolicy:cedar-java","purl":"pkg:maven/com.cedarpolicy/cedar-java","ranges":["<2.3.6"],"fixed":["2.3.6"]},{"ecosystem":"Maven","name":"com.cedarpolicy:cedar-java","purl":"pkg:maven/com.cedarpolicy/cedar-java","ranges":[">=3.1.2 <3.4.1"],"fixed":["3.4.1"]},{"ecosystem":"Maven","name":"com.cedarpolicy:cedar-java","purl":"pkg:maven/com.cedarpolicy/cedar-java","ranges":[">=4.0.0 <4.9.0"],"fixed":["4.9.0"]}]}],"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."]}