CVE-2026-44283
etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks
NONE 0.0
At a glance
- Source
- NVD
- EPSS
- EPSS 0.22 % · percentile 13 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-863 — Incorrect Authorization
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | NONE 0.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N | GitHub_M |
| CVSS 3.1 | NONE 0.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | MEDIUM 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-x35m-3gp4-4fh5 — etcd RBAC bypass allows unauthorized data access via PrevKv/lease attachment in nested transaction Put requests
- GO-2026-5736 — Etcd RBAC bypass via PrevKv/lease in nested transactions in go.etcd.io/etcd/v3 in go.etcd.io/etcd/server
European references
- ENISA EUVD · EUVD-2026-30345
- GCVE · GCVE-0-2026-44283
Affected configurations (NVD CPE)
cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*< 3.4.44cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*≥ 3.5.0 < 3.5.30cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*≥ 3.6.0 < 3.6.11
Affected products
| Product | Versions |
|---|---|
| etcd-io · etcd | affected < 3.4.44 ; affected >= 3.5.0, <= 3.5.29 ; affected >= 3.6.0, <= 3.6.10 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |