Description
CedarJava is an open source Java implementation of the Cedar policy language, used for fine-grained authorization decisions. In versions prior to 2.3.6, 3.4.1 and 4.9.0, under certain circumstances, improper input handling could allow Record-to-Entity type confusion across the Java-Rust FFI boundary. CedarJava sends authorization requests to the Rust cedar-policy evaluator as JSON. The JSON protocol reserves magic single-key object shapes (__entity and __extn) for entity references and extension values. When serializing a CedarMap, there is no validation preventing these reserved keys from being used. If an integrating service builds a CedarMap from caller-supplied key/value data (such as request headers, user-defined metadata, or resource tags), an actor who controls those keys could cause the Rust evaluator to interpret a record as an entity reference. This issue requires the integrating service to build a CedarMap where the an actor controls the keys, and a policy must reference that value in a when/unless clause. This vulnerability has been fixed in versions 2.3.6, 3.4.1, and 4.9.
Severity (CVSS)
| Base score | 8.8 |
|---|---|
| Severity | High |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Provided by | CNA |
Weaknesses
- CWE-843 — CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
Affected products
| Vendor | Product | Versions |
|---|---|---|
| cedar-policy | cedar-java | < 2.3.6; >= 3.1.2, < 3.4.1; >= 4.0.0, < 4.9.0 |
References
- https://github.com/cedar-policy/cedar-java/security/advisories/GHSA-93g4-m6xv-cmvr (x_refsource_CONFIRM)
Generated from the official CVE List on 14 Jul 2026 07:01 UTC.