CVE-2026-26018
Last modified
CVE-2026-26018 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.79% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Coredns.Io | Coredns | < 1.14.2 |
References
- https://github.com/coredns/coredns/releases/tag/v1.14.2Product, Release Notes
- https://github.com/coredns/coredns/security/advisories/GHSA-h75p-j8xm-m278Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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