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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.

PUBLISHED Reserved 2026-05-05 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitHub_M

Problem types

CWE-863: Incorrect Authorization

Product status

< 3.4.44
affected

>= 3.5.0, <= 3.5.29
affected

>= 3.6.0, <= 3.6.10
affected

References

github.com/...o/etcd/security/advisories/GHSA-x35m-3gp4-4fh5

cve.org (CVE-2026-44283)

nvd.nist.gov (CVE-2026-44283)

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