CVE-2026-73499
Description
etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.
How to fix
- go.etcd.io/etcd/v33.7.1, 3.6.14, 3.5.33 or later
- go.etcd.io/etcd/server/v33.5.33, 3.6.14, 3.7.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| go.etcd.io/etcd/v3Go | 3.7.0-alpha.0 ≤ v < 3.7.1, 3.6.0 ≤ v < 3.6.14, v < 3.5.33 | 3.7.1, 3.6.14, 3.5.33 |
| go.etcd.io/etcd/server/v3Go | v < 3.5.33, 3.6.0 ≤ v < 3.6.14, 3.7.0-alpha.0 ≤ v < 3.7.1 | 3.5.33, 3.6.14, 3.7.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.