CVE-2026-44283
etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks
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.
INFO
Published Date :
May 14, 2026, 6:16 p.m.
Last Modified :
May 15, 2026, 6:24 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | NONE | [email protected] | ||||
| CVSS 3.1 | NONE | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update etcd to 3.4.44, 3.5.30, or 3.6.11.
- Verify RBAC policies are enforced correctly.
- Review transaction operations for compliance.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44283.
| URL | Resource |
|---|---|
| https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5 | Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44283 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44283
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44283 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44283 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:* versions up to (excluding) 3.4.44 *cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (excluding) 3.5.30 *cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (excluding) 3.6.11 Added Reference Type GitHub, Inc.: https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5 Types: Mitigation, Vendor Advisory -
New CVE Received by [email protected]
May. 14, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N Added CWE CWE-863 Added Reference https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5