CVE Explorer
CVE-2026-33190
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on non-plain-DNS transports (DoT, DoH, DoH3, DoQ, and gRPC) because it trusts the transport writer's TsigStatus() instead of performing verification itself. The DoH and DoH3 writer's TsigStatus() always returns nil, the DoT server does not set TsigSecret on the dns.Server, and the DoQ and gRPC writers also unconditionally return nil. This allows an unauthenticated remote client to bypass TSI
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"coredns","vendor":"coredns","versions":[{"status":"affected","version":"< 1.14.3"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:1af3b42b5bd4fdb7f13bcfc5949fc5ede6b4fa0ed1aa9d78722ff0409ff47ca9 · sha256:bb5bde71df579921… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:1af3b42b5bd4fdb7f13bcfc5949fc5ede6b4fa0ed1aa9d78722ff0409ff47ca9 · sha256:bb5bde71df579921… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-303","description":"CWE-303: Incorrect Implementation of Authentication Algorithm","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:1af3b42b5bd4fdb7f13bcfc5949fc5ede6b4fa0ed1aa9d78722ff0409ff47ca9 · sha256:bb5bde71df579921… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"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"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1af3b42b5bd4fdb7f13bcfc5949fc5ede6b4fa0ed1aa9d78722ff0409ff47ca9 · sha256:bb5bde71df579921… · /containers/cna/references/1
{"name":"https://github.com/coredns/coredns/security/advisories/GHSA-qhmp-q7xh-99rh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/coredns/coredns/security/advisories/GHSA-qhmp-q7xh-99rh"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1af3b42b5bd4fdb7f13bcfc5949fc5ede6b4fa0ed1aa9d78722ff0409ff47ca9 · sha256:bb5bde71df579921… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/coredns/coredns/security/advisories/GHSA-qhmp-q7xh-99rh"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1af3b42b5bd4fdb7f13bcfc5949fc5ede6b4fa0ed1aa9d78722ff0409ff47ca9 · sha256:bb5bde71df579921… · /containers/adp/0/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.