EUVD-2026-18206
GHSA-cjm2-j6cm-6p6m
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Lifecycle Timeline
5Blast Radius
ecosystem impact- 53 maven packages depend on org.keycloak:keycloak-services (25 direct, 28 indirect)
Ecosystem-wide dependent count for version 26.5.7.
DescriptionNVD
A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to the theft of an access token, resulting in information disclosure.
AnalysisAI
Open redirect in Red Hat Build of Keycloak allows authenticated attackers with control over another path on the same web server to bypass wildcard-based redirect URI validation and steal OAuth access tokens. Attack requires low complexity and user interaction (CVSS 7.3). …
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RemediationAI
Within 24 hours: Inventory all Keycloak deployments and document which instances share web servers with user-controllable or third-party content paths. Within 7 days: Implement strict redirect URI whitelisting (exact matching, not wildcards) and disable any unnecessary path hosting on shared servers; review Keycloak authentication logs for suspicious redirect attempts. …
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External POC / Exploit Code
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