CVE Explorer
CVE-2026-32936
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-HTTPS (DoH) GET path accepts oversized dns= query parameter values and performs URL query parsing, base64 decoding, and DNS message unpacking before rejecting the request. Unlike the POST path, which applies a bounded read via http.MaxBytesReader limited to 65536 bytes, the GET path has no equivalent size validation before expensive processing. A remote, unauthenticated attacker can repeatedly send oversized D
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:v2:7d5cdf29c290873a88ac2b595a59e226328955b91e53ef006169c39c2d6f431d · sha256:efef9dfc0495a9d4… · /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:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:7d5cdf29c290873a88ac2b595a59e226328955b91e53ef006169c39c2d6f431d · sha256:efef9dfc0495a9d4… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:7d5cdf29c290873a88ac2b595a59e226328955b91e53ef006169c39c2d6f431d · sha256:efef9dfc0495a9d4… · /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:v2:7d5cdf29c290873a88ac2b595a59e226328955b91e53ef006169c39c2d6f431d · sha256:efef9dfc0495a9d4… · /containers/cna/references/1
{"name":"https://github.com/coredns/coredns/security/advisories/GHSA-63cw-r7xf-jmwr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/coredns/coredns/security/advisories/GHSA-63cw-r7xf-jmwr"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7d5cdf29c290873a88ac2b595a59e226328955b91e53ef006169c39c2d6f431d · sha256:efef9dfc0495a9d4… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/coredns/coredns/security/advisories/GHSA-63cw-r7xf-jmwr"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7d5cdf29c290873a88ac2b595a59e226328955b91e53ef006169c39c2d6f431d · sha256:efef9dfc0495a9d4… · /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.