CVE-2026-14199: Grafana

High severity, CVSS 8.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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 Grafana: before 11.0.0 (fixed in 11.0.0); from 12.4.10, before 13.0.0 (fixed in 13.0.0); from 13.0.8, before 13.1.0 (fixed in 13.1.0); from 13.1.5, before 13.2.0 (fixed in 13.2.0)

Published 2026-09-02. Last modified 2026-09-15.