CVE-2026-26018Disclosure(coredns.io / coredns)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch coredns.io coredns systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-337CWE-400CWE-770CWE-1241

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • coredns

Threat summary

  • Patch or workaround signal is available
  • 4 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 4 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked 2d ago at 2 mentions (2026-03-06); latest day: 1
  • 4 total mentions across 3 days

Affected systems

Vendors
Products
coredns

Deep dive

Activity timeline4 mentions / 3d
01122Mentions · 2026-03-06: 2Mentions · 2026-03-12: 1Mentions · 2026-05-09: 1Patch / Workaround · 2026-03-12: 1Technical Details · 2026-03-06: 2Technical Details · 2026-03-12: 1Technical Details · 2026-05-09: 103-0603-1205-09
Signal classification3 categories
Disclosure
250.0%
Patch
125.0%
General
125.0%
Referenced assets4 URLs
Classification over time
DateTotalLabels
2026-03-062
Disclosure2
2026-03-121
Patch1
2026-05-091
General1
Full discourse4 posts
  • IntegSec@integ_sec
    General

    CVE-2026-26018: CoreDNS Loop Detection Denial of Service - What It Means for Your Business and How to Respond https://hubs.li/Q04g0Zd30

    Post summary

    The referenced CVE-2026-26018 is a Denial of Service flaw in CoreDNS; the article promises to discuss its business impact and response measures, but no PoC, exploit code, patch, or active exploitation details are provided.

    0000027
    30 followersView on X
  • ThreatCluster@threatcluster
    Patch

    CoreDNS security updates for Fedora and openSUSE fix DNS access control bypass CVE-2026-26017 and DoS flaws CVE-2026-26018, CVE-2025-68156. Patch promptly. #Vulnerabilities https://threatcluster.io/cluster/critical-security-updates-for-coredns-address-multiple-vulne-4f3dc5f5

    Post summary

    Fedora and openSUSE releases for CoreDNS contain patches for CVE‑2026‑26017, CVE‑2026‑26018, and CVE‑2025‑68156, with a call to promptly apply the updates.

    0000098
    100 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-26018 Denial of Service Vulnerability in CoreDNS Loop Detection Plugin Before 1.14.2 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-26018

    Post summary

    CVE-2026-26018 is identified as a denial‑of‑service vulnerability in the CoreDNS Loop Detection plugin prior to version 1.14.2, as reported by vulmon.

    0000036
    4.0K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-26018 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 attac… https://www.cve.org/CVERecord?id=CVE-2026-26018

    Post summary

    The tweet announces a denial of service vulnerability in CoreDNS's loop detection plugin affecting versions before 1.14.2, without providing PoC, exploit, or patch information.

    0000079
    56.6K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appcoredns.iocoredns---

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