HOMEVULNERABILITIESCVE-2026-26018
HIGH

CVE-2026-26018

CWE-337Published: March 6, 2026· Updated: Mar 9, 2026

7.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:11.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-26018 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

coredns.io1 product
coredns
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/coredns/coredns/security/advisories/GHSA-h75p-j8xm-m278

All References (2)

→
https://github.com/coredns/coredns/releases/tag/v1.14.2Product · Release Notes
→
https://github.com/coredns/coredns/security/advisories/GHSA-h75p-j8xm-m278Vendor Advisory · Exploit

Quick Facts

CVE IDCVE-2026-26018
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-337
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMar 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-26018 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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