CVSS 3.1
6.3 mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:NCVE-2026-26017
Medium (6.3) in coredns.io coredns. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/coredns/coredns 1.14.2.
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a logical vulnerability in CoreDNS allows DNS access controls to be bypassed due to the default execution order of plugins. Security plugins such as acl are evaluated before the rewrite plugin, resulting in a Time-of-Check Time-of-Use (TOCTOU) flaw. This issue has been patched in version 1.14.2.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-31)
- CWE
- CWE-367
- Published
- Modified
- Record from
- the NVD, synced
Affected
- coredns.io:coredns
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-c9v3-4pv7-87pr | Go | github.com/coredns/coredns | <1.14.2 | 1.14.2 |
| GO-2026-4630 | Go | github.com/coredns/coredns | <1.14.2 | 1.14.2 |