CVE-2026-26017
Last modified
CVE-2026-26017 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. 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. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Coredns.Io | Coredns | < 1.14.2 |
References
- https://github.com/coredns/coredns/releases/tag/v1.14.2Product, Release Notes
- https://github.com/coredns/coredns/security/advisories/GHSA-c9v3-4pv7-87prMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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