CVE-2026-55771

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity88% × 45%
The EG Score, 8.8 of 10.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 13, 2026

Last Modified

July 14, 2026

Advisory Details (1)

Auto-updated Jul 13, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Cedar-Java has incorrect equality comparison vulnerability · Advisory · cedar-policy/cedar-java · GitHub

https://github.com/cedar-policy/cedar-java/security/advisories/GHSA-4r9r-4425-74p7

Vendor Advisories for CVE-2026-55771(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
com.cedarpolicy:cedar-java4.0.0 ... 4.8.0 (9 versions)
  • every version up to 2.3.6: fixed in 2.3.6
  • 3.1.2 up to 3.4.1: fixed in 3.4.1
  • 4.0.0 up to 4.9.0: fixed in 4.9.0
—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 35× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 134 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 34 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  3. 2026-10-12 15:55 UTCEG score recompute
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  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
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  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-10-01 14:12 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  20. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-09-28 09:29 UTCEG score recompute
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
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  1. 2026-09-24 10:04 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  3. 2026-09-23 04:18 UTCEG score recompute
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  6. 2026-09-18 05:01 UTCEG score recompute
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  10. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  11. 2026-09-13 23:31 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  13. 2026-09-13 07:59 UTCEG score recompute
  14. 2026-09-12 01:50 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  16. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-09-08 01:54 UTCEG score recompute
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  20. 2026-09-06 13:49 UTCEG score recompute
  21. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-09-05 21:24 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  25. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  26. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  27. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  28. 2026-08-30 05:28 UTCEG score recompute
  29. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  30. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  31. 2026-08-28 03:31 UTCEG score recompute
  32. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  33. 2026-08-27 00:13 UTCEG score recompute
  34. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
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  36. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  37. 2026-08-24 23:30 UTCEG score recompute
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  40. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  41. 2026-08-22 06:03 UTCEG score recompute
  42. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  43. 2026-08-21 03:46 UTCEG score recompute
  44. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  45. 2026-08-20 01:11 UTCEG score recompute
  46. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  47. 2026-08-18 20:26 UTCEG score recompute
  48. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  49. 2026-08-18 02:42 UTCEG score recompute
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  51. 2026-08-16 22:52 UTCEG score recompute
  52. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  53. 2026-08-16 09:47 UTCEG score recompute
  54. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  55. 2026-08-15 07:38 UTCEG score recompute
  56. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  57. 2026-08-14 03:57 UTCEG score recompute
  58. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  59. 2026-08-13 01:47 UTCEG score recompute
  60. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  61. 2026-08-11 23:34 UTCEG score recompute
  62. 2026-08-11 10:29 UTCEG score recompute
  63. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  64. 2026-08-09 19:16 UTCEG score recompute
  65. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  66. 2026-08-08 17:08 UTCEG score recompute
  67. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  68. 2026-08-08 04:03 UTCEG score recompute
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  70. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  71. 2026-08-05 23:45 UTCEG score recompute
  72. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  73. 2026-08-04 21:21 UTCEG score recompute
  74. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  75. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.3% · 27th percentile

Related CVEs(same product + same CWE)

Same product

2 shown

Maven:com.cedarpolicy:cedar-java

Frequently asked(5)

What is CVE-2026-55771?
CVE-2026-55771 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-55771 published?
The CVE record for CVE-2026-55771 was published on July 13, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 14, 2026; the record at its source may have been updated since.
Is CVE-2026-55771 actively exploited?
CVE-2026-55771 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55771?
CVE-2026-55771 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55771?
A fix for CVE-2026-55771 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55771 are linked in the Vendor Advisories panel on this page.

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