CVE-2026-18967

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 96% 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
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: 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 SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
Patch available. Sources: redhat.
redhat

Bug Access Denied

https://bugzilla.redhat.com/show_bug.cgi?id=2511604
redhat Patch Available

CVE-2026-18967 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-18967

Vendor Advisories for CVE-2026-18967(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 23× in last 7d / 99× 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 156 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-18967?
CVE-2026-18967 is a high vulnerability published on August 6, 2026. A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion…
When was CVE-2026-18967 disclosed?
CVE-2026-18967 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18967 actively exploited?
CVE-2026-18967 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 95.9% of all scored CVEs.
What is the CVSS score of CVE-2026-18967?
CVE-2026-18967 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-18967?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18967, 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.

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