[UPDATE] [medium] CoreDNS: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in CoreDNS to bypass security measures and conduct a Denial of Service attack.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to bypass security measures and conduct a Denial of Service attack.
- Who is affected
- Deployments of CoreDNS are affected.
- Urgency
- Remediation is medium urgency due to the potential for Denial of Service attacks.
- Action
- Update to the latest version of CoreDNS to mitigate these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0627
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-260170.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
- Moderate exploitation riskCVE-2026-260181.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 62% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-26017 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-26018 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for CoreDNS
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- medium[NEW] [medium] CoreDNS: Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-10
- medium[UPDATE] [medium] CoreDNS: Vulnerability allows denial of servicecert-bund · 2026-07-09
- medium[UPDATE] [medium] CoreDNS: Vulnerability allows denial of servicecert-bund · 2026-07-09
- medium[UPDATE] [medium] CoreDNS: Multiple vulnerabilities allowcert-bund · 2026-07-02
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