CVE-2026-18963 | defend.network

What is CVE-2026-18963?

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.

CVSS9.1 NVD 3.1

SeverityCRITICAL

ExploitationNo exploitation reported

EPSS3% · P88

Triage statusNo Known Exploit

ActionPatch within 48 hours

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWECWE-640

NVD published2026-08-18

NVD last modified2026-09-08

Timeline

2026-08-18Published to the U.S. National Vulnerability Database (NVD)
2026-09-08NVD record last updated

Affected product

See advisory

Remediation Steps

Apply Red Hat security patch for Keycloak immediately
Verify that password reset flows require proper authentication
Audit recent account activity and password reset requests
Consider implementing additional MFA controls for sensitive accounts

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 4 of August 2026 (August 24 – 30)

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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.