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.
CVE-2026-55771
HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EPSS
- 26.7%
- KEV
- Not listed
Published
July 13, 2026
Last Modified
July 14, 2026
Advisory Details (1)
Auto-updated Jul 13, 2026Patch available. Sources: github.
github Patch Available
Cedar-Java has incorrect equality comparison vulnerability · Advisory · cedar-policy/cedar-java · GitHub
https://github.com/cedar-policy/cedar-java/security/advisories/GHSA-4r9r-4425-74p7Frequently asked(5)
What is CVE-2026-55771?
CVE-2026-55771 is a high vulnerability published on July 13, 2026. 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()…
When was CVE-2026-55771 disclosed?
CVE-2026-55771 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55771 actively exploited?
CVE-2026-55771 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55771?
CVE-2026-55771 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-55771?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55771, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
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