{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-32934", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-17T00:05:53.282Z", "datePublished": "2026-05-05T19:06:17.080Z", "dateUpdated": "2026-05-06T15:14:54.790Z"}, "containers": {"cna": {"title": "CoreDNS DNS-over-QUIC unbounded goroutine growth leads to denial of service", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5"}, {"name": "https://github.com/coredns/coredns/releases/tag/v1.14.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/coredns/coredns/releases/tag/v1.14.3"}], "affected": [{"vendor": "coredns", "product": "coredns", "versions": [{"version": "< 1.14.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-05T19:06:17.080Z"}, "descriptions": [{"lang": "en", "value": "CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can be driven into unbounded goroutine and memory growth by a remote client that opens many QUIC streams and sends only 1 byte per stream. When the worker pool is full, CoreDNS still spawns a goroutine per accepted stream to wait for a worker token. Additionally, active workers block indefinitely in io.ReadFull() with no per-stream read deadline, allowing an attacker to pin all workers by sending a single byte so the read blocks waiting for the second byte of the DoQ length prefix. This enables an unauthenticated remote attacker to cause memory exhaustion and OOM-kill. This issue has been fixed in version 1.14.3. No known workarounds exist."}], "source": {"advisory": "GHSA-2wpx-qpw2-g5h5", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-06T15:14:18.362180Z", "id": "CVE-2026-32934", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-06T15:14:54.790Z"}}]}}

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