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Advisory record · GHSA-rp95-xpg9-c2cq

Keycloak: Open redirect when using wildcard valid redirect URIs in Keycloak

CVSS 8.1 HighEPSS 0.0064 · 50th percentile

Published by the GitHub Advisory Database at 19 May 2026, 12:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.keycloak:keycloak-servicesMaven<26.6.226.6.2
Identifiers
GHSA-rp95-xpg9-c2cq · BIT-keycloak-2026-7504 · CVE-2026-7504
Weakness (CWE)
CWE-601
Tags
Published
19 May 2026
Updated
26 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Keycloak's keycloak-services package, versions before 26.6.2, is vulnerable to an open redirect in clients that use a wildcard (*) in their Valid Redirect URIs setting. An attacker can craft a request with multiple @ characters in the user-info part of a redirect URL to bypass validation, which requires a user to interact with a malicious link and could expose sensitive information or enable further attacks. Upgrade keycloak-services to version 26.6.2 or later.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.1 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.0064, the 50th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:19 UTC First seen by agentprime
  2. 31 Oct 2026, 14:19 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.