CVE-2026-18218

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — Patch released this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the TokenManager component of the Keycloak identity management service. When an administrator attempts to revoke tokens for a specific application (client) using a "not-before" policy, the revocation may be silently ignored if the overall security realm already has an older, non-zero revocation policy in place. This issue can allow previously issued tokens to remain valid for refreshing sessions and accessing user information even after an administrator has attempted to invalidate them. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

July 31, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Jul 31, 2026
Patch available. Sources: redhat.
redhat

2508313 – (CVE-2026-18218) CVE-2026-18218 keycloak-services: keycloak-services: Client not-before revocation ignored when realm not-before is older but nonzero

https://bugzilla.redhat.com/show_bug.cgi?id=2508313
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-18218

Vendor Advisories for CVE-2026-18218(2)

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 / EcosystemFixed in / PatchReleasedSource
redhatrhbk/keycloak-rhel9-operator:26.6-202026-09-16redhat
redhatrhbk-openshift-rhel9/rhbk-openshift-rhel92026-09-16redhat

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.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 22× in last 7d / 74× 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 136 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-18218?
CVE-2026-18218 is a medium vulnerability published on July 31, 2026. A flaw was found in the TokenManager component of the Keycloak identity management service. When an administrator attempts to revoke tokens for a specific application (client) using a "not-before" policy, the revocation may be silently ignored if the overall security realm already has an older,…
When was CVE-2026-18218 disclosed?
CVE-2026-18218 was first published in the National Vulnerability Database on July 31, 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-2026-18218 actively exploited?
CVE-2026-18218 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.5% of all scored CVEs.
What is the CVSS score of CVE-2026-18218?
CVE-2026-18218 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-18218?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18218, 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

Explore the affected products and dependency analysis for CVE-2026-18218

Explore →

Is Your Infrastructure Affected by CVE-2026-18218?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs