CVE-2026-18218

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 97% 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 — 3 sources updated 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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
3%
KEV
Not listed

Published

July 31, 2026

Last Modified

August 31, 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(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 69× 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 122 total refreshes for this CVE.

  1. 2026-09-15 07:06 UTCEG score recompute
  2. 2026-09-15 07:06 UTCGHSA enrichment
  3. 2026-09-14 06:17 UTCEG score recompute
  4. 2026-09-14 06:17 UTCGHSA enrichment
  5. 2026-09-13 16:46 UTCEPSS rescore
  6. 2026-09-13 06:27 UTCEG score recompute
  7. 2026-09-13 06:27 UTCGHSA enrichment
  8. 2026-09-12 15:00 UTCEPSS rescore
  9. 2026-09-12 06:37 UTCEG score recompute
  10. 2026-09-12 06:37 UTCGHSA enrichment
  11. 2026-09-11 09:36 UTCEPSS rescore
  12. 2026-09-11 06:47 UTCEG score recompute
  13. 2026-09-11 06:47 UTCGHSA enrichment
  14. 2026-09-10 09:34 UTCEPSS rescore
  15. 2026-09-10 06:57 UTCGHSA enrichment
  16. 2026-09-09 07:07 UTCEG score recompute
  17. 2026-09-09 07:06 UTCGHSA enrichment
  18. 2026-09-08 22:00 UTCEPSS rescore
  19. 2026-09-07 19:37 UTCEG score recompute
  20. 2026-09-07 19:37 UTCGHSA enrichment
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-06 11:17 UTCGHSA enrichment
  24. 2026-09-05 11:26 UTCEG score recompute
  25. 2026-09-05 11:26 UTCGHSA enrichment
Show 75 more
  1. 2026-09-04 11:21 UTCGHSA enrichment
  2. 2026-09-03 09:13 UTCEG score recompute
  3. 2026-09-03 09:13 UTCGHSA enrichment
  4. 2026-09-02 14:11 UTCEPSS rescore
  5. 2026-09-01 22:35 UTCEG score recompute
  6. 2026-09-01 22:35 UTCGHSA enrichment
  7. 2026-09-01 13:53 UTCEPSS rescore
  8. 2026-09-01 04:39 UTCEPSS rescore
  9. 2026-08-31 15:39 UTCGHSA enrichment
  10. 2026-08-30 22:13 UTCEG score recompute
  11. 2026-08-30 22:13 UTCGHSA enrichment
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-29 22:23 UTCEG score recompute
  15. 2026-08-29 22:23 UTCGHSA enrichment
  16. 2026-08-28 21:41 UTCEPSS rescore
  17. 2026-08-27 20:46 UTCEG score recompute
  18. 2026-08-27 20:46 UTCGHSA enrichment
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 19:16 UTCGHSA enrichment
  21. 2026-08-25 18:32 UTCEG score recompute
  22. 2026-08-25 18:32 UTCGHSA enrichment
  23. 2026-08-25 13:48 UTCEPSS rescore
  24. 2026-08-24 18:36 UTCEG score recompute
  25. 2026-08-24 18:36 UTCGHSA enrichment
  26. 2026-08-23 18:46 UTCEG score recompute
  27. 2026-08-23 18:46 UTCGHSA enrichment
  28. 2026-08-23 00:19 UTCEPSS rescore
  29. 2026-08-22 18:57 UTCEG score recompute
  30. 2026-08-22 18:57 UTCGHSA enrichment
  31. 2026-08-21 23:49 UTCEPSS rescore
  32. 2026-08-21 19:07 UTCEG score recompute
  33. 2026-08-21 19:07 UTCGHSA enrichment
  34. 2026-08-20 22:55 UTCEPSS rescore
  35. 2026-08-20 19:17 UTCGHSA enrichment
  36. 2026-08-19 19:27 UTCEG score recompute
  37. 2026-08-19 19:27 UTCGHSA enrichment
  38. 2026-08-19 17:03 UTCEPSS rescore
  39. 2026-08-18 18:26 UTCEG score recompute
  40. 2026-08-18 18:26 UTCGHSA enrichment
  41. 2026-08-18 13:48 UTCEPSS rescore
  42. 2026-08-17 17:00 UTCEG score recompute
  43. 2026-08-17 17:00 UTCGHSA enrichment
  44. 2026-08-17 13:47 UTCEPSS rescore
  45. 2026-08-16 17:10 UTCEG score recompute
  46. 2026-08-16 17:10 UTCGHSA enrichment
  47. 2026-08-16 14:56 UTCEPSS rescore
  48. 2026-08-16 02:14 UTCEPSS rescore
  49. 2026-08-15 17:20 UTCEG score recompute
  50. 2026-08-15 17:20 UTCGHSA enrichment
  51. 2026-08-15 01:30 UTCEPSS rescore
  52. 2026-08-14 17:30 UTCEG score recompute
  53. 2026-08-14 17:30 UTCGHSA enrichment
  54. 2026-08-13 22:00 UTCEPSS rescore
  55. 2026-08-13 17:40 UTCGHSA enrichment
  56. 2026-08-12 17:38 UTCEG score recompute
  57. 2026-08-12 17:38 UTCGHSA enrichment
  58. 2026-08-12 13:50 UTCEPSS rescore
  59. 2026-08-11 17:49 UTCEG score recompute
  60. 2026-08-11 17:49 UTCGHSA enrichment
  61. 2026-08-11 13:42 UTCEPSS rescore
  62. 2026-08-11 00:00 UTCEPSS rescore
  63. 2026-08-10 17:59 UTCGHSA enrichment
  64. 2026-08-09 17:45 UTCEG score recompute
  65. 2026-08-09 17:45 UTCGHSA enrichment
  66. 2026-08-09 13:46 UTCEPSS rescore
  67. 2026-08-08 17:56 UTCEG score recompute
  68. 2026-08-08 17:56 UTCGHSA enrichment
  69. 2026-08-08 16:37 UTCEPSS rescore
  70. 2026-08-07 18:06 UTCEG score recompute▲ 1.20
  71. 2026-08-07 18:06 UTCGHSA enrichment
  72. 2026-08-07 18:05 UTCNVD updateCVSS v3 → 5.4
  73. 2026-08-07 16:15 UTCGHSA enrichment
  74. 2026-08-06 16:25 UTCEG score recompute
  75. 2026-08-06 16:25 UTCGHSA enrichment

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 August 31, 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 96.9% 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

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