CVE-2026-55771General

LOWCVSS 8.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-94CWE-697CWE-843

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • General: 2 classified signals
  • Peaked 1d ago at 2 mentions (2026-07-13); latest day: 1
  • 3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-07-13: 2Mentions · 2026-07-15: 1Patch / Workaround · 2026-07-15: 1Technical Details · 2026-07-15: 107-1307-15
Signal classification2 categories
General
266.7%
Patch
133.3%
Referenced assets2 URLs
By indicator
Classification over time
DateTotalLabels
2026-07-132
General2
2026-07-151
Patch1
Full discourse3 posts
  • DFIR Lab@DFIR_Lab
    Patch

    🚨 HIGH Severity: CVE-2026-55771 (CVSS 8.8) CedarJava authorization library has inverted equality logic in EntityIdentifier[.]equals(). Affects integrators performing custom entity ID comparisons. ✅ Patch: Update to v4[.]9[.]0 #CVE #Vulnerability #PatchNow https://t.co/4J4JBHCd4A

    Post summary

    The tweet announces CVE‑2026‑55771, details its technical flaw, and provides a specific patch update, confirming a readily available fix.

    0000034
    75 followersView on X
  • Infoflowcloud@infoflowcloud
    General

    🚨*CVE* CVE-2026-55771 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 EntityIde… https://www.cve.org/CVERecord?id=CVE-2026-55771 ----- Traducción: CVE-2026-55771 Ced… http://infoflow.cloud`

    Post summary

    The tweet merely announces CVE‑2026‑55771 and provides a link to the CVE record, offering no additional exploit, patch, or technical detail.

    0000034
    92 followersView on X
  • CVE@CVEnew
    General

    CVE-2026-55771 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 EntityIde… https://www.cve.org/CVERecord?id=CVE-2026-55771

    Post summary

    The excerpt offers a very brief reference to CVE-2026-55771 with minimal context and no evidence of PoC, exploitation, patching, or detailed technical data.

    00000655
    57.8K followersView on X

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