CVE-2026-18572

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-02. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Keycloak provides authorization services that allow administrators to restrict access to resources based on time policies (for example, only allowing access during business hours). A flaw was discovered where a user can include a fake time value in their authorization request that overrides the actual server time. This allows the user to bypass these time-based restrictions and access protected resources at unauthorized times.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
30th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 2, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Aug 2, 2026
Patch available. Sources: redhat.
redhat

2509763 – (CVE-2026-18572) CVE-2026-18572 keycloak-services: keycloak-services: UMA claim token can override authorization time-policy evaluation attributes

https://bugzilla.redhat.com/show_bug.cgi?id=2509763
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-18572

Vendor Advisories for CVE-2026-18572(3)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhbk-openshift-rhel9/rhbk-openshift-rhel92026-09-16redhat
redhatrhbk/keycloak-rhel9-operator:26.6-202026-09-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 77× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 174 total refreshes for this CVE.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 06:24 UTCEG score recompute
  3. 2026-10-04 06:24 UTCVendor advisory
  4. 2026-10-04 06:24 UTCGHSA enrichment
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-02 10:28 UTCEG score recompute
  7. 2026-10-02 10:28 UTCVendor advisory
  8. 2026-10-02 10:27 UTCGHSA enrichment
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-10-01 02:41 UTCEG score recompute
  11. 2026-10-01 02:41 UTCVendor advisory
  12. 2026-10-01 02:41 UTCGHSA enrichment
  13. 2026-09-30 15:02 UTCEPSS rescore
  14. 2026-09-29 15:20 UTCEPSS rescore
  15. 2026-09-29 06:46 UTCEG score recompute
  16. 2026-09-29 06:46 UTCVendor advisory
  17. 2026-09-29 06:46 UTCGHSA enrichment
  18. 2026-09-27 18:21 UTCEG score recompute
  19. 2026-09-27 18:21 UTCVendor advisory
  20. 2026-09-27 18:21 UTCGHSA enrichment
  21. 2026-09-27 13:47 UTCEPSS rescore
  22. 2026-09-26 15:58 UTCEPSS rescore
  23. 2026-09-24 10:00 UTCEG score recompute
  24. 2026-09-24 10:00 UTCVendor advisory
  25. 2026-09-24 10:00 UTCGHSA enrichment
Show 75 more
  1. 2026-09-23 08:28 UTCEG score recompute
  2. 2026-09-23 08:28 UTCVendor advisory
  3. 2026-09-23 08:28 UTCGHSA enrichment
  4. 2026-09-22 06:55 UTCEG score recompute
  5. 2026-09-22 06:55 UTCVendor advisory
  6. 2026-09-22 06:55 UTCGHSA enrichment
  7. 2026-09-20 05:36 UTCEG score recompute
  8. 2026-09-20 05:36 UTCVendor advisory
  9. 2026-09-20 05:36 UTCGHSA enrichment
  10. 2026-09-19 03:56 UTCEG score recompute
  11. 2026-09-19 03:56 UTCVendor advisory
  12. 2026-09-19 03:56 UTCGHSA enrichment
  13. 2026-09-18 19:27 UTCEPSS rescore
  14. 2026-09-18 01:14 UTCEG score recompute
  15. 2026-09-18 01:14 UTCVendor advisory
  16. 2026-09-18 01:14 UTCGHSA enrichment
  17. 2026-09-16 19:20 UTCEG score recompute
  18. 2026-09-16 19:20 UTCGHSA enrichment
  19. 2026-09-16 18:41 UTCEG score recompute
  20. 2026-09-16 18:41 UTCGHSA enrichment
  21. 2026-09-16 17:11 UTCEG score recompute
  22. 2026-09-16 17:11 UTCGHSA enrichment
  23. 2026-09-16 15:55 UTCEG score recompute
  24. 2026-09-16 15:55 UTCGHSA enrichment
  25. 2026-09-16 14:07 UTCEPSS rescore
  26. 2026-09-16 05:22 UTCEG score recompute
  27. 2026-09-16 05:22 UTCGHSA enrichment
  28. 2026-09-16 05:14 UTCEPSS rescore
  29. 2026-09-15 02:52 UTCGHSA enrichment
  30. 2026-09-13 18:07 UTCEG score recompute
  31. 2026-09-13 18:07 UTCGHSA enrichment
  32. 2026-09-13 16:46 UTCEPSS rescore
  33. 2026-09-12 16:32 UTCEG score recompute
  34. 2026-09-12 16:32 UTCGHSA enrichment
  35. 2026-09-12 15:00 UTCEPSS rescore
  36. 2026-09-11 14:54 UTCEG score recompute
  37. 2026-09-11 14:54 UTCGHSA enrichment
  38. 2026-09-11 14:52 UTCEPSS rescore
  39. 2026-09-11 09:36 UTCEPSS rescore
  40. 2026-09-10 09:34 UTCEPSS rescore
  41. 2026-09-10 08:53 UTCGHSA enrichment
  42. 2026-09-09 06:56 UTCEG score recompute
  43. 2026-09-09 06:56 UTCGHSA enrichment
  44. 2026-09-08 22:00 UTCEPSS rescore
  45. 2026-09-07 22:15 UTCEG score recompute
  46. 2026-09-07 22:15 UTCGHSA enrichment
  47. 2026-09-07 16:01 UTCEPSS rescore
  48. 2026-09-06 20:45 UTCEG score recompute
  49. 2026-09-06 20:45 UTCGHSA enrichment
  50. 2026-09-06 13:47 UTCEPSS rescore
  51. 2026-09-05 18:43 UTCEG score recompute
  52. 2026-09-05 18:43 UTCGHSA enrichment
  53. 2026-09-04 10:33 UTCEG score recompute
  54. 2026-09-04 10:33 UTCGHSA enrichment
  55. 2026-09-04 05:06 UTCEPSS rescore
  56. 2026-09-03 09:00 UTCEG score recompute
  57. 2026-09-03 09:00 UTCGHSA enrichment
  58. 2026-09-02 14:11 UTCEPSS rescore
  59. 2026-09-01 22:23 UTCEG score recompute
  60. 2026-09-01 22:23 UTCGHSA enrichment
  61. 2026-09-01 13:53 UTCEPSS rescore
  62. 2026-09-01 04:39 UTCEPSS rescore
  63. 2026-08-31 15:39 UTCEG score recompute
  64. 2026-08-31 15:39 UTCGHSA enrichment
  65. 2026-08-30 23:42 UTCEG score recompute
  66. 2026-08-30 23:42 UTCGHSA enrichment
  67. 2026-08-30 19:17 UTCEPSS rescore
  68. 2026-08-30 01:22 UTCEPSS rescore
  69. 2026-08-29 22:11 UTCEG score recompute
  70. 2026-08-29 22:11 UTCGHSA enrichment
  71. 2026-08-28 21:41 UTCEPSS rescore
  72. 2026-08-27 23:10 UTCEG score recompute
  73. 2026-08-27 23:10 UTCGHSA enrichment
  74. 2026-08-27 14:25 UTCEPSS rescore
  75. 2026-08-26 21:39 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-18572?
CVE-2026-18572 is a medium vulnerability published on August 2, 2026. Keycloak provides authorization services that allow administrators to restrict access to resources based on time policies (for example, only allowing access during business hours). A flaw was discovered where a user can include a fake time value in their authorization request that overrides the…
When was CVE-2026-18572 disclosed?
CVE-2026-18572 was first published on August 2, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18572 actively exploited?
CVE-2026-18572 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18572?
CVE-2026-18572 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18572?
A fix for CVE-2026-18572 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18572 are linked in the Vendor Advisories panel on this page.

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