Low [CVE-2026-37977] Information disclosure via CORS header injection due to unvalidated JWT azp claim
This low-severity Red Hat Linux advisory covers CVE-2026-37977 affecting rhbk/keycloak-operator-bundle:26.4.13, rhbk/keycloak-rhel9-operator:26.4, rhbk/keycloak-rhel9:26.4.
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Summary
Information disclosure via CORS header injection due to unvalidated JWT azp claim. Red Hat rates this low (CVSS 3.7).
Weakness: CWE-346. Affected package(s): rhbk/keycloak-operator-bundle:26.4.13, rhbk/keycloak-rhel9-operator:26.4, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9:26.4, rhbk/keycloak-operator-bundle:26.6.3, rhbk/keycloak-rhel9:26.6.
Resolved in Red Hat advisory RHSA-2026:30049 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux.
- rhbk/keycloak-operator-bundle:26.4.13-1
- rhbk/keycloak-rhel9-operator:26.4-19
- rhbk/keycloak-rhel9
- rhbk/keycloak-rhel9:26.4-19
- rhbk/keycloak-operator-bundle:26.6.3-3
- rhbk/keycloak-rhel9:26.6-6
- rhbk/keycloak-rhel9-operator:26.6-6
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:30049
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:30049 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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