Auth bypass in Grafana
CVE-2026-14199
Only self-managed Grafana instances with Auth Proxy authentication and identity caching enabled (sync_ttl greater than zero) are affected. The Auth Proxy cache key concatenated the username and forwarded identity attributes without a delimiter, so distinct identities could collide on one key. An authenticated user who shapes their own attributes to collide with a higher-privileged user's, while that user's cache entry is live, is authenticated as that user, up to Administrator (authentication bypass by spoofing).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.003 (22.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- grafana.com/security/security-advisories/cve-2026-14199 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-14199?
- CVE-2026-14199 is a high-severity vulnerability in Grafana, classified under Authentication Bypass by Spoofing. CVSS score: 7.1/10. Published 2026-09-02.
- How severe is CVE-2026-14199?
- High severity. CVSS v3 base score is 7.1 out of 10.