[UPDATE] [medium] CoreDNS: Multiple vulnerabilities enable denial of service

mediumCVE-2022-27191 CVE-2022-28948

A remote, anonymous attacker can exploit multiple vulnerabilities in CoreDNS to perform a denial of service attack.

CSIRTS triage

vendor: CoreDNS product: CoreDNS Denial of service

What: Multiple vulnerabilities in CoreDNS enable remote denial of service attacks.
Who is affected: CoreDNS instances exposed to unauthenticated remote attackers.
Urgency: Medium priority; DoS attacks can disrupt DNS services but lack code execution impact.
Action: Upgrade CoreDNS to patched version addressing CVE-2022-27191 and CVE-2022-28948.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-10
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-0461

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.

Moderate exploitation riskCVE-2022-271913.9% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 89% of all EPSS-scored CVEs.
Moderate exploitation riskCVE-2022-289484.0% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 90% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2022-27191	coverage & exploitation status	NVD · CVE.org
CVE-2022-28948	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] IBM DB2: Multiple vulnerabilities enable code executioncert-bund
high[NEW] [high] Dell PowerProtect Data Domain: Multiple vulnerabilitiescert-bund
medium[UPDATE] [medium] Splunk Splunk Enterprise: Multiple vulnerabilities in third-party componentscert-bund

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 · 2026-07-17
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
highCVE-2026-62309: CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte pac…msrc · 2026-07-14
mediumCVE-2026-62299: CoreDNS: rewrite-plugin EDNS0 response-revert nil-pointer panic (remote DoS) when a downstream…msrc · 2026-07-14