CVE-2026-93999

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreHIGH confidence

Score 4.2 from GitHub Security Advisory published 2026-09-19. a secondary CVSS source baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
4.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.2Exploit: 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 OIDC protocol implementation of Keycloak, an open-source identity and access management solution. The issue occurs during the token refresh process when the server restores requested audiences from stored client IDs. Keycloak fails to verify if the target audience client is still enabled before issuing a new access token. This allows an application with an existing refresh token to continue obtaining valid access tokens for a disabled client, potentially bypassing administrative access controls for resource servers that rely on offline JWT validation.

CVSS v3
4.2
EG Score
4.2(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity42% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

September 19, 2026

Last Modified

September 22, 2026

Advisory Details (2)

Auto-updated Sep 19, 2026
Patch available. Sources: redhat.
redhat

2537165 – (CVE-2026-93999) CVE-2026-93999 keycloak-services: keycloak-services: Token refresh continues issuing tokens for disabled audience clients

https://bugzilla.redhat.com/show_bug.cgi?id=2537165
redhat Patch Available

CVE-2026-93999 - 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-2026-93999

Vendor Advisories for CVE-2026-93999(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 21× in last 7d / 21× 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. 2026-09-24 22:59 UTCEG score recompute
  2. 2026-09-24 22:59 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 21:15 UTCEG score recompute
  5. 2026-09-23 21:15 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-22 19:53 UTCGHSA enrichment
  8. 2026-09-22 16:23 UTCEG score recompute
  9. 2026-09-22 16:23 UTCGHSA enrichment
  10. 2026-09-22 16:06 UTCEG score recompute
  11. 2026-09-22 16:06 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-21 21:09 UTCEPSS rescore
  14. 2026-09-21 18:13 UTCEG score recompute
  15. 2026-09-21 18:13 UTCGHSA enrichment
  16. 2026-09-20 20:16 UTCEPSS rescore
  17. 2026-09-20 16:50 UTCEG score recompute
  18. 2026-09-20 16:50 UTCGHSA enrichment
  19. 2026-09-19 15:28 UTCEG score recompute
  20. 2026-09-19 14:25 UTCEG score recompute
  21. 2026-09-19 14:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-93999?
CVE-2026-93999 is a medium vulnerability published on September 19, 2026. A flaw was found in the OIDC protocol implementation of Keycloak, an open-source identity and access management solution. The issue occurs during the token refresh process when the server restores requested audiences from stored client IDs. Keycloak fails to verify if the target audience client is…
When was CVE-2026-93999 disclosed?
CVE-2026-93999 was first published in the National Vulnerability Database on September 19, 2026, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-93999 actively exploited?
CVE-2026-93999 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 88.0% of all scored CVEs.
What is the CVSS score of CVE-2026-93999?
CVE-2026-93999 has a CVSS v3 base score of 4.2 (NVD).
How do I remediate CVE-2026-93999?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93999, 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-2026-93999

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