CVE-2026-74909
CVE CVE-2026-74909EUVD EUVD-2026-80829Published 2026-09-16T14:54:47.000ZLast changed 2026-09-18T18:04:05.000ZCVSS 8.1
What the advisory describes
Keycloak provides a policy enforcer to protect applications by matching incoming web requests against defined security policies. A flaw was found where the enforcer fails to correctly normalize web addresses that contain special encoded characters, such as those representing semicolons or directory traversal segments. An authenticated user can use these encoded characters to trick the enforcer into applying a less restrictive security policy than intended, potentially gaining unauthorized access to sensitive administrative or private application endpoints.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Red Hat — Red Hat build of Keycloak 26.4 patch: 26.4-26; patch: 26.4.16-2
- Red Hat — Red Hat build of Keycloak 26.6 patch: 26.6-20; patch: 26.6.7-3
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Red Hat — Red Hat build of Keycloak
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