CVEvulnerability

CVE-2026-26018

7.5 HIGH Published 2026-03-06 Modified 2026-07-15 Official page ↗
Status
Modified
Published
2026-03-06
Last modified
2026-07-15
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-1241, CWE-337, CWE-400, CWE-770

Description

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.

Affected configurations

• coredns.io coredns (< 1.14.2)

Related

Weakness · CWE (4)

  • CWE-1241 Use of Predictable Algorithm in Random Number Generator weakness
  • CWE-337 Predictable Seed in Pseudo-Random Number Generator (PRNG) weakness
  • CWE-400 Uncontrolled Resource Consumption weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References