Medium [CVE-2026-79656] OAuth and OIDC tokens written unredacted to Grafana server logs
This medium-severity Red Hat Linux advisory covers CVE-2026-79656; related products: Multicluster Global Hub, Red Hat Advanced Cluster Management for Kubernetes 2, Red Hat Ceph Storage 7.
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Summary
OAuth and OIDC tokens written unredacted to Grafana server logs. Red Hat rates this moderate (CVSS 5.9).
Weakness: CWE-256. Red Hat lists fixing advisory RHSA-2026:90990 with package grafana13-1-main-13.1.8-0.5.hum1, grafana13-2-main-13.2.4-0.4.hum1, grafana12-4-main-12.4.13-0.5.hum1.
Affected products named by the advisory: Multicluster Global Hub; Red Hat Advanced Cluster Management for Kubernetes 2; Red Hat Ceph Storage 7; Red Hat Ceph Storage 8; and 6 more.
Affected products named by the advisory: Red Hat Ceph Storage 9; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 2 more.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 20 hours ago·verify at source
- grafana13-1-main-13.1.8-0.5.hum1
- grafana13-2-main-13.2.4-0.4.hum1
- grafana12-4-main-12.4.13-0.5.hum1
- RHSA-2026:90990
Official advisory · high-confidence parse· fetched 20 hours ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict read access to Grafana server logs and any downstream log pipelines. Additionally, minimize the scopes granted to the Grafana OAuth client to limit the potential impact of leaked tokens. If your identity provider issues long-lived or non-expiring tokens, consider rotating the Grafana OAuth client secret and revoking issued tokens at the provider.
Official advisory · high-confidence parse· fetched 20 hours ago·verify at source
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