CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCVE-2026-44283
Medium (4.3) in etcd etcd. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in go.etcd.io/etcd/v3 3.5.30, 3.6.11.
etcd is a distributed key-value store for the data of a distributed system. Prior to 3.4.44, 3.5.30, and 3.6.11, a vulnerability in etcd allows read access via PrevKv, or lease attachment in Put requests within transaction operations, to bypass RBAC authorization checks. An authenticated user without sufficient read or lease-related permissions may be able to access unauthorized data or attach leases by invoking transaction operations with these features enabled. This vulnerability is fixed in 3.4.44, 3.5.30, and 3.6.11.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-31)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- etcd:etcd
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-x35m-3gp4-4fh5 | Go | go.etcd.io/etcd/v3 | >=3.6.0 <3.6.11 | 3.6.11 |
| GHSA-x35m-3gp4-4fh5 | Go | go.etcd.io/etcd/v3 | >=3.5.0 <3.5.30 | 3.5.30 |
| GHSA-x35m-3gp4-4fh5 | Go | go.etcd.io/etcd | <3.4.44 | 3.4.44 |
| GO-2026-5736 | Go | go.etcd.io/etcd/server/v3 | >=3.5.0 <3.5.30 >=3.6.0 <3.6.11 | 3.5.30, 3.6.11 |