CVE
CVE-2026-26018
CoreDNS Loop Detection Denial of Service Vulnerability
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.
Package Versions Affected
Package Version
patch Availability
No items found.
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Detect compatible fix
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Related Resources
No items found.
References
https://github.com/coredns/coredns/releases/tag/v1.14.2, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26018.json, https://github.com/coredns/coredns/security/advisories/GHSA-h75p-j8xm-m278, https://nvd.nist.gov/vuln/detail/CVE-2026-26018
Basic Information
Ecosystem
