Auth bypass in Etcd
CVE-2026-33413
etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, unauthorized users may bypass authentication or authorization checks and call certain etcd functions in clusters that…
Vulnerability class: Broken Access Control
EPSS: 0.002 (16.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Etcd
- Etcd-io Etcd — versions >= 3.6.0-alpha.0, < 3.6.9, >= 3.5.0-alpha.0, < 3.5.28, < 3.4.42
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33413?
- CVE-2026-33413 is a high-severity vulnerability in Etcd, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-03-26.
- How severe is CVE-2026-33413?
- High severity. CVSS v3 base score is 8.8 out of 10.