CVE-2026-55771: Cedar-Policy CedarJava incorrect equality comparison in EntityIdentifier

CVE-2026-55771 · Severity: high · CVSS 8.8 · Published 2026-07-13

Cedar-Java is a library used to manage fine-grained access control and authorization decisions in Java applications. A flaw in how the library compares identity information could lead to incorrect security decisions, potentially allowing unauthorized access or data exposure. While the core authorization engine is not directly affected, any custom security checks built by developers using this library may behave incorrectly.

Technologies: Cedar Policy Cedar-Java, com.cedarpolicy:cedar-java (Maven). Vendors: Cedar Policy, Maven.

Quick answers

Is CVE-2026-55771 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-55771 being exploited in the wild.
How severe is CVE-2026-55771?
High severity, with a CVSS score of 8.8, published 13 July 2026.
Which products and versions are affected?
Cedar Policy Cedar-Java < 2.3.6, >= 3.1.2 < 3.4.1, >= 4.0.0 < 4.9.0, < 4.9.0; com.cedarpolicy:cedar-java (Maven) ECOSYSTEM:introduced=0,fixed=2.3.6.
Is there a fix for CVE-2026-55771?
Yes. com.cedarpolicy:cedar-java (Maven): upgrade to 2.3.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-55771 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-55771?
Check whether you run Cedar Policy Cedar-Java or com.cedarpolicy:cedar-java (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • com.cedarpolicy:cedar-java (Maven): upgrade to 2.3.6 or later
    # set com.cedarpolicy:cedar-java to 2.3.6 in your pom.xml or build.gradle

Technical details

Cedar-Java contains multiple vulnerabilities including policy injection (CWE-94), type confusion (CWE-843), and incorrect equality comparison (CWE-697). Specifically, the EntityIdentifier.equals() method has inverted logic for null and self-reference checks, returning true for null comparisons and false for self-comparisons. While Cedar's core authorization decisions are computed in Rust and remain unaffected, Java integrators relying on this method for manual security-sensitive equality checks may experience logic bypasses. The vulnerability is reachable over the network if the application processes user-supplied entity identifiers. Patches are available in versions 2.3.6, 3.4.1, and 4.9.0.

Affected products

  • cedar-policy cedar-java < 2.3.6, >= 3.1.2 < 3.4.1, >= 4.0.0 < 4.9.0

Identifiers

  • CVE-2026-55771
  • GHSA-4r9r-4425-74p7

Timeline

  • 2026-06-05: disclosed
  • 2026-06-05: patched
  • 2026-07-13: advisory: NVD publication
  • 2026-07-28: advisory: GitHub Advisory Database publication

References

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