# CVE-2026-44283: etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks

CVE-2026-44283 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-44283, released May 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-44283
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 14, 2026
- Weakness: Incorrect Authorization
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44283

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | etcd Debian 14 | 3.5.16-11 | [DEBIAN-CVE-2026-44283](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44283.md) | May 14, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260727T201416-160000.1.1 | [OPENSUSE-SU-2026:21551-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21551-1.md) | Aug 10, 2026 |
| Linux | govulncheck-vulndb sles 16.0 | 0.0.20260727T201416-160000.1.1 | [SUSE-SU-2026:23227-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23227-1.md) | Aug 10, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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