PT-2026-50975 · Maven · Com.Cedarpolicy:Cedar-Java

Publicado

2026-06-19

·

Atualizado

2026-06-19

·

CVE-2026-55772

CVSS v3.1

8.8

Alta

VetorAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

CedarJava is an open source Java implementation of the Cedar policy language, used for fine-grained authorization decisions. Under certain circumstances, improper input handling could allow type confusion across the Java-Rust FFI boundary.

Impact

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.

Impacted versions:

< 4.9

Patches

Addressed in CedarJava version 2.3.6, 3.4.1, and 4.9 and above. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.

Workarounds

Enable schema-based request validation to catch type mismatches. Validate that user-controlled data does not contain reserved keys ( entity or extn) before building CedarMap objects.

References

If you have any questions or comments about this advisory, we ask that you contact us directly via email to cedar-policy-security@lists.cncf.io. Please do not create a public GitHub issue.

Correção

Type Confusion

Encontrou algum problema na descrição? Tem algo a acrescentar? Fique à vontade para nos escrever 👾
dbugs@ptsecurity.com

Enumeração de Fraquezas

CWE-843

Identificadores relacionados

CVE-2026-55772
GHSA-93G4-M6XV-CMVR

Produtos afetados

Com.Cedarpolicy:Cedar-Java