What’s Vulnerable › Vulnerabilities
CVE-2026-14199: Session takeover via Auth Proxy cache key collision
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-02 · updated 2026-09-15
- Weakness: CWE-290
Description
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).
Affected products
- Grafana: before 11.0.0; from 12.4.10 before 13.0.0; from 13.0.8 before 13.1.0; from 13.1.5 before 13.2.0 — fixed in 11.0.0, 13.0.0, 13.1.0, 13.2.0
How to fix
Upgrade to a fixed version: Grafana 11.0.0, 13.0.0, 13.1.0, 13.2.0. Check the vendor advisory for mitigations.
References
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