CVE-2026-26017

MEDIUM EPSS 22.1%
Published Mar 6, 20263mo ago · Modified Jun 17, 20261w ago
6.3 CVSS 3.1
Medium
Find Similar
Published Mar 6, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.3
Exploitability
1.8
Impact
4.0
Vector string
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
22.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-367

Affected Products 1

VendorProductVersionRange
coredns.iocoredns* <1.14.2

References 2

  • github.com https://github.com/coredns/coredns/releases/tag/v1.14.2
    ProductRelease Notes
  • github.com https://github.com/coredns/coredns/security/advisories/GHSA-c9v3-4pv7-87pr
    MitigationVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.