Vulnerability · Published May 14, 2026 · Assigned by GitHub_M
CVE-2026-44283etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks
None 0.0
In plain English
A incorrect authorization in etcd from etcd-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | etcd | no fix listed | DEBIAN-CVE-2026-44283 |
| Debian:13 | etcd | no fix listed | DEBIAN-CVE-2026-44283 |
| Debian:14 | etcd | 3.5.16-11 | DEBIAN-CVE-2026-44283 |
| Go | go.etcd.io/etcd | 3.4.44 | GHSA-x35m-3gp4-4fh5 |
| Go | go.etcd.io/etcd/server/v3 | 3.5.30, 3.6.11 | GO-2026-5736 |
| Go | go.etcd.io/etcd/v3 | 3.5.30 | GHSA-x35m-3gp4-4fh5 |
| Go | go.etcd.io/etcd/v3 | 3.6.11 | GHSA-x35m-3gp4-4fh5 |
| Ubuntu:25.10 | etcd | no fix listed | UBUNTU-CVE-2026-44283 |
| Ubuntu:26.10 | etcd | no fix listed | UBUNTU-CVE-2026-44283 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
References
- https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5 x_refsource_CONFIRM