CVE-2026-26018 is a high-severity denial of service vulnerability affecting CoreDNS versions prior to 1.14.2. An unauthenticated attacker can crash the DNS server by sending specially crafted queries, leveraging a predictable pseudo-random number generator and a fatal error handler in the loop detection plugin. This vulnerability has a CVSS score of 7.5, indicating a high impact on availability with low attack complexity and no user interaction required. There is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed on the CISA KEV catalog, suggesting it is not actively exploited. However, the vulnerability has garnered significant community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.14.2CPE matchmatch criteria | cpe:2.3:a:coredns.io:coredns:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.