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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| etcd-io | etcd | < 3.5.33, >= 3.6.0, < 3.6.14, >= 3.7.0-alpha.0, < 3.7.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | etcd | No fix yet | — |
| Debian 13 | etcd | No fix yet | — |
| Debian 12 | etcd | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | etcd | No fix yet | — |
| Ubuntu 16.04 LTS | etcd | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 24.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 22.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 20.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 18.04 LTS | etcd | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | govulncheck-vulndb | 0.0.20260827T195228-160000.1.1 | SUSE-SU-2026:23625-1 |
| SLES 16.0 | govulncheck-vulndb | 0.0.20260827T195228-160000.1.1 | SUSE-SU-2026:23625-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260827T195228-160000.1.1 | openSUSE-SU-2026:21761-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | dapr-scheduler-1.17 | 1.17.13-r1 | — |
| Wolfi rolling | kine | 0.16.4-r1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| 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 | GO-2026-6114 |
| 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 | GHSA-xg4h-6gfc-h4m8 |
Advisories 3
- WID-SEC-2026-2825 etcd: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 26, 2026
- SUSE-SU-2026:23625-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:21761-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 9, 2026
References
- https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8
- 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
- https://github.com/etcd-io/etcd/releases/tag/v3.6.14
- https://github.com/etcd-io/etcd/releases/tag/v3.7.1