Vulnerability · Published Jul 13, 2026 · Assigned by GitHub_M
CVE-2026-55771CedarJava has policy injection, type confusion, and incorrect equality comparison vulnerabilities
High 8.8
In plain English
A high-severity code injection in cedar-java from cedar-policy. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | com.cedarpolicy:cedar-java | 2.3.6 | GHSA-4r9r-4425-74p7 |
| Maven | com.cedarpolicy:cedar-java | 3.4.1 | GHSA-4r9r-4425-74p7 |
| Maven | com.cedarpolicy:cedar-java | 4.9.0 | GHSA-4r9r-4425-74p7 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| cedar-policy | cedar-java | < 4.9.0 |
Weakness: CWE-94, CWE-697, CWE-843 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H