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 28× in last 7d / 61× 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.

  1. 2026-08-21 08:31 UTCEG score recompute
  2. 2026-08-21 08:31 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 19:57 UTCGHSA enrichment
  5. 2026-08-20 07:24 UTCGHSA enrichment
  6. 2026-08-19 18:51 UTCEG score recompute
  7. 2026-08-19 18:51 UTCGHSA enrichment
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-19 04:32 UTCGHSA enrichment
  10. 2026-08-18 15:55 UTCEG score recompute
  11. 2026-08-18 15:55 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 03:20 UTCGHSA enrichment
  14. 2026-08-17 14:41 UTCEG score recompute
  15. 2026-08-17 14:41 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 02:08 UTCEG score recompute
  18. 2026-08-17 02:08 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 13:34 UTCEG score recompute
  21. 2026-08-16 13:34 UTCGHSA enrichment
  22. 2026-08-16 02:14 UTCEPSS rescore
  23. 2026-08-16 01:01 UTCGHSA enrichment
  24. 2026-08-15 12:28 UTCEG score recompute
  25. 2026-08-15 12:28 UTCGHSA enrichment
Show 36 more
  1. 2026-08-15 01:30 UTCEPSS rescore
  2. 2026-08-14 23:55 UTCGHSA enrichment
  3. 2026-08-14 11:21 UTCGHSA enrichment
  4. 2026-08-13 22:48 UTCEG score recompute
  5. 2026-08-13 22:48 UTCGHSA enrichment
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-13 10:15 UTCGHSA enrichment
  8. 2026-08-12 21:41 UTCEG score recompute
  9. 2026-08-12 21:41 UTCGHSA enrichment
  10. 2026-08-12 13:50 UTCEPSS rescore
  11. 2026-08-12 09:08 UTCGHSA enrichment
  12. 2026-08-11 20:35 UTCEG score recompute
  13. 2026-08-11 20:35 UTCGHSA enrichment
  14. 2026-08-11 13:42 UTCEPSS rescore
  15. 2026-08-11 08:01 UTCEG score recompute
  16. 2026-08-11 08:01 UTCGHSA enrichment
  17. 2026-08-11 00:00 UTCEPSS rescore
  18. 2026-08-10 19:28 UTCEG score recompute▲ 1.70
  19. 2026-08-10 19:28 UTCGHSA enrichment
  20. 2026-08-10 19:26 UTCNVD updateCVSS v3 → 8.1 · severity → HIGH
  21. 2026-08-10 03:32 UTCEG score recompute
  22. 2026-08-10 03:32 UTCGHSA enrichment
  23. 2026-08-09 13:46 UTCEPSS rescore
  24. 2026-08-09 01:50 UTCEG score recompute
  25. 2026-08-09 01:50 UTCGHSA enrichment
  26. 2026-08-08 16:37 UTCEPSS rescore
  27. 2026-08-08 00:07 UTCEG score recompute
  28. 2026-08-08 00:07 UTCGHSA enrichment
  29. 2026-08-06 22:24 UTCEG score recompute
  30. 2026-08-06 22:24 UTCGHSA enrichment
  31. 2026-08-06 15:48 UTCEG score recompute
  32. 2026-08-06 15:48 UTCGHSA enrichment
  33. 2026-08-06 13:46 UTCEPSS rescore
  34. 2026-08-06 07:17 UTCEG score recompute
  35. 2026-08-06 06:25 UTCEG score recompute
  36. 2026-08-06 06:25 UTCMITRE cvelistV5first tracked

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 95.8% 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.

Dependency Blast Radius

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