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Critical · 9.1 Scanner template Public exploit CVE-2026-18963 BIT-keycloak-2026-18963EUVD-2026-61063GHSA-4gv3-mc9p-5wqc

Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass

Published Aug 18, 2026 · Updated Nov 12, 2026 · Assigned by redhat

Vendor: Red Hat Product: Red Hat build of Keycloak 26.4 Product: Red Hat build of Keycloak 26.4.15 Product: Red Hat build of Keycloak 26.6 Product: Red Hat build of Keycloak 26.6.6 Product: Red Hat JBoss Enterprise Application Platform Expansion Pack Product: Red Hat Single Sign-On 7 Product: Red Hat Single Sign-On 7.6 for RHEL 7 Product: Red Hat Single Sign-On 7.6 for RHEL 8 Product: Red Hat Single Sign-On 7.6 for RHEL 9 Product: RHEL-8 based Middleware Containers Package: keycloak-26.5 Package: keycloak-26.5-iamguarded-compat Package: org.keycloak:keycloak-services Ecosystem: Maven Ecosystem: Wolfi

Description

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.

Affected products

VendorProductAffectedFixed
Red Hat Red Hat build of Keycloak 26.4 — —
Red Hat Red Hat build of Keycloak 26.4.15 — —
Red Hat Red Hat build of Keycloak 26.6 — —
Red Hat Red Hat build of Keycloak 26.6.6 — —
Red Hat Red Hat Single Sign-On 7 — —
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 — —
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 — —
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 — —
Red Hat RHEL-8 based Middleware Containers — —
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack — —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling keycloak-26.5 +1 26.5.7-r6 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

GitHub 17 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.keycloak:keycloak-services >= 26.0.0, < 26.4.15 26.4.15 GHSA-4gv3-mc9p-5wqc
Maven org.keycloak:keycloak-services >= 26.5.0, < 26.6.6 26.6.6 GHSA-4gv3-mc9p-5wqc
Maven org.keycloak:keycloak-services >= 26.7.0, < 26.7.2 26.7.2 GHSA-4gv3-mc9p-5wqc

Advisories 8

References