| Package | Affected versions | Patched versions |
|---|---|---|
| grafana | ≥ 12.4.10, < 13.0.0≥ 13.0.8, < 13.1.0≥ 13.1.5, < 13.2.0< 11.0.0 | 13.0.013.1.013.2.011.0.0 |
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).
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