CVE-2026-73499
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.
- CVSS 4.0
- 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-25)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xg4h-6gfc-h4m8 | Go | go.etcd.io/etcd/v3 | >=3.7.0-alpha.0 <3.7.1 | 3.7.1 |
| GHSA-xg4h-6gfc-h4m8 | Go | go.etcd.io/etcd/v3 | >=3.6.0 <3.6.14 | 3.6.14 |
| GHSA-xg4h-6gfc-h4m8 | Go | go.etcd.io/etcd/v3 | <3.5.33 | 3.5.33 |
| GO-2026-6114 | Go | go.etcd.io/etcd/server/v3 | <3.5.33 >=3.6.0 <3.6.14 >=3.7.0-alpha.0 <3.7.1 | 3.5.33, 3.6.14, 3.7.1 |
References
- https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41
- https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed
- https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae
- https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7
- https://github.com/etcd-io/etcd/releases/tag/v3.5.33