[NEW] [medium] CoreDNS: Multiple vulnerabilities allow Denial of Service
A remote, anonymous attacker can exploit multiple vulnerabilities in CoreDNS to conduct a Denial of Service attack.
CSIRTS triage
- What
- Multiple vulnerabilities allow a remote attacker to conduct a Denial of Service attack.
- Who is affected
- Remote, anonymous attackers targeting CoreDNS deployments.
- Urgency
- Remediation is medium urgency due to the potential for Denial of Service.
- Action
- Monitor for updates and apply patches when available.
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-2026-2271
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[NEU] [mittel] CoreDNS: Schwachstelle ermöglicht Manipulation von DNS Einträgencert-bund · 2026-09-07
- medium[UPDATE] [medium] CoreDNS: Multiple vulnerabilities enable denial of servicecert-bund · 2026-08-10
- lowCVE-2026-62994: CoreDNS is a DNS server written in Go. From 1.9.4 until 1.14.5, a network DNS client allowed t…nvd · 2026-07-16
- highCVE-2026-62309: CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can cras…nvd · 2026-07-16
- mediumCVE-2026-62299: CoreDNS is a DNS server written in Go. Prior to 1.14.5, the CoreDNS rewrite plugin supports ed…nvd · 2026-07-16
- lowCVE-2026-62994: CoreDNS `k8s_external` headless AXFR can emit an empty transfer batch that panics the `transfe…msrc · 2026-07-14
More from CERT-Bund (BSI) Security Advisories
- high[UPDATE] [hoch] Red Hat Enterprise Linux (postgis, virtuoso-opensource): Mehrere Schwachstellen2026-09-11
- medium[UPDATE] [mittel] Red Hat Enterprise Linux: Mehrere Schwachstellen2026-09-11
- medium[UPDATE] [mittel] Linux Kernel: Schwachstelle ermöglicht Denial of Service2026-09-11
- medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellen2026-09-11
- high[UPDATE] [hoch] OpenSSL: Mehrere Schwachstellen2026-09-11