CVE-2026-18963

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — Patch released this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
Patch available. Sources: redhat.
redhat

2511595 – (CVE-2026-18963) CVE-2026-18963 keycloak-services: keycloak-services: Unauthenticated account takeover via reset-credentials flow bypass

https://bugzilla.redhat.com/show_bug.cgi?id=2511595
redhat Patch Available

CVE-2026-18963 - 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-2026-18963

Vendor Advisories for CVE-2026-18963(5)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhbk/keycloak-rhel9-operator:26.4-232026-08-18redhat
redhatrhbk/keycloak-rhel9-operator:26.6-122026-08-18redhat
redhatrhbk-openshift-rhel9/rhbk-openshift-rhel92026-08-18redhat

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.

Data Freshness Timeline

(refreshed 52× in last 7d / 52× 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 06:54 UTCVendor advisory
  2. 2026-08-21 06:54 UTCGHSA enrichment
  3. 2026-08-21 02:45 UTCEG score recompute
  4. 2026-08-21 02:45 UTCVendor advisory
  5. 2026-08-21 02:45 UTCGHSA enrichment
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-20 22:38 UTCVendor advisory
  8. 2026-08-20 22:38 UTCGHSA enrichment
  9. 2026-08-20 18:31 UTCVendor advisory
  10. 2026-08-20 18:31 UTCGHSA enrichment
  11. 2026-08-20 14:25 UTCEG score recompute
  12. 2026-08-20 14:25 UTCVendor advisory
  13. 2026-08-20 14:25 UTCGHSA enrichment
  14. 2026-08-20 13:56 UTCVendor advisory
  15. 2026-08-20 13:56 UTCGHSA enrichment
  16. 2026-08-20 12:28 UTCVendor advisory
  17. 2026-08-20 12:28 UTCGHSA enrichment
  18. 2026-08-20 08:22 UTCEG score recompute
  19. 2026-08-20 08:22 UTCVendor advisory
  20. 2026-08-20 08:22 UTCGHSA enrichment
  21. 2026-08-20 07:32 UTCEG score recompute
  22. 2026-08-20 07:32 UTCVendor advisory
  23. 2026-08-20 07:32 UTCGHSA enrichment
  24. 2026-08-20 03:57 UTCVendor advisory
  25. 2026-08-20 03:57 UTCGHSA enrichment
Show 27 more
  1. 2026-08-19 23:51 UTCVendor advisory
  2. 2026-08-19 23:51 UTCGHSA enrichment
  3. 2026-08-19 19:45 UTCEG score recompute
  4. 2026-08-19 19:45 UTCVendor advisory
  5. 2026-08-19 19:45 UTCGHSA enrichment
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-19 15:38 UTCVendor advisory
  8. 2026-08-19 15:38 UTCGHSA enrichment
  9. 2026-08-19 11:33 UTCVendor advisory
  10. 2026-08-19 11:32 UTCGHSA enrichment
  11. 2026-08-19 07:26 UTCVendor advisory
  12. 2026-08-19 07:26 UTCGHSA enrichment
  13. 2026-08-19 03:20 UTCEG score recompute
  14. 2026-08-19 03:20 UTCVendor advisory
  15. 2026-08-19 03:20 UTCGHSA enrichment
  16. 2026-08-19 02:18 UTCEG score recompute
  17. 2026-08-19 02:18 UTCVendor advisory
  18. 2026-08-19 02:18 UTCGHSA enrichment
  19. 2026-08-19 01:44 UTCVendor advisory
  20. 2026-08-19 01:44 UTCGHSA enrichment
  21. 2026-08-18 21:36 UTCEG score recompute
  22. 2026-08-18 21:36 UTCGHSA enrichment
  23. 2026-08-18 20:58 UTCGHSA enrichment
  24. 2026-08-18 20:43 UTCEG score recompute
  25. 2026-08-18 20:43 UTCGHSA enrichment
  26. 2026-08-18 17:17 UTCEG score recompute
  27. 2026-08-18 17:14 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18963?
CVE-2026-18963 is a critical vulnerability published on August 18, 2026. A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the…
When was CVE-2026-18963 disclosed?
CVE-2026-18963 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18963 actively exploited?
CVE-2026-18963 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 67.6% of all scored CVEs.
What is the CVSS score of CVE-2026-18963?
CVE-2026-18963 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-18963?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18963, 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-2026-18963

Explore →

Is Your Infrastructure Affected by CVE-2026-18963?

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

Start Free Scan →Browse All CVEs