# CVE-2026-74909

Keycloak policy enforcer bypass via encoded characters allows unauthorized access.

- Page: https://www.vulneraibility.com/cve/CVE-2026-74909
- CVSS: 8.1
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.85% (percentile 58.1)
- CISA SSVC: exploitation none, automatable no, technical impact total (assessed 2026-09-18)
- Weakness: CWE-862
- Published: 2026-09-16

## Affected

- Keycloak (policy enforcer)
- Red Hat Single Sign-On / Red Hat SSO

## Impact

Authenticated users can use encoded chars (e.g., semicolons, traversal) to bypass the policy enforcer and access administrative or private application endpoints.

## Action

Immediate action required

## Recommendation

Apply vendor patches immediately; block/normalize encoded special chars in request handling.

## References

- [advisory] https://access.redhat.com/errata/RHSA-2026:68276
- [advisory] https://access.redhat.com/errata/RHSA-2026:68277
- [advisory] https://access.redhat.com/errata/RHSA-2026:68278
- [advisory] https://access.redhat.com/errata/RHSA-2026:68280
- [other] https://access.redhat.com/security/cve/CVE-2026-74909
- [other] https://bugzilla.redhat.com/show_bug.cgi?id=2517354

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.