VULNERABILITY INTELLIGENCE

CVE-2026-26018

CVSS score7.5 HIGH
EPSS probability1.24%
CISA KEVNot currently listed
Published2026-03-06
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

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

Primary references