GO-2026-6114
Watch API authorization bypass in go.etcd.io/etcd/server/v3
At a glance
- Published
- Updated
- CVE
- CVE-2026-73499
- Aliases
- BIT-etcd-2026-73499, GHSA-xg4h-6gfc-h4m8
Description
In go.etcd.io/etcd/server/v3 before 3.5.33, 3.6.14, and 3.7.1, an authenticated user with READ permission on a single key can bypass RBAC restrictions by initiating an open-ended range watch using clientv3.WithFromKey(). The Watch RPC handler normalized open-ended range ends prior to authorization checks, causing isWatchPermitted to evaluate the request as a single-key watch while the underlying watch stream received events for all keys lexicographically greater than or equal to the target key.
Affected packages
| Package | Versions |
|---|---|
| Go · go.etcd.io/etcd/server/v3 | introduced 0, fixed 3.5.33, introduced 3.6.0, fixed 3.6.14, introduced 3.7.0-alpha.0, fixed 3.7.1 |
References
- https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8 ADVISORY
- https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41 FIX
- https://github.com/etcd-io/etcd/releases/tag/v3.5.33 WEB
- https://github.com/etcd-io/etcd/releases/tag/v3.6.14 WEB
- https://github.com/etcd-io/etcd/releases/tag/v3.7.1 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |