Auth bypass in Coredns
CVE-2026-33489
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch() function in plugin/transfe…
Vulnerability class: Broken Access Control
EPSS: 0.000 (3.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Coredns — versions < 1.14.3
- Coredns.io Coredns
Weakness classification (CWE)
References
- https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3 (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- https://github.com/coredns/coredns/releases/tag/v1.14.3 (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33489?
- CVE-2026-33489 is a high-severity vulnerability in Coredns, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-05-05.
- How severe is CVE-2026-33489?
- High severity. CVSS v3 base score is 7.5 out of 10.