CVE-2026-55771 json
CedarJava has policy injection, type confusion, and incorrect equality comparison vulnerabilities
published 2026-07-13 3 mo ago modified 2026-10-24 15 d ago also GHSA-4r9r-4425-74p7 , EUVD-2026-43524
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven com.cedarpolicy:cedar-java 2.3.6, 3.4.1, 4.9.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | com.cedarpolicy:cedar-java | <2.3.6 >=3.1.2, <3.4.1 >=4.0.0, <4.9.0 |
2.3.6 3.4.1 4.9.0 |
Affected products
- cedar-policy cedar-java
Classification
References
Sources
- CVE List CVE-2026-55771
- GitHub Advisory GHSA-4r9r-4425-74p7
- NVD CVE-2026-55771
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