{"id":"AZL-85724","summary":"CVE-2026-32936 affecting package coredns for versions less than 1.11.4-17","details":"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 DoH GET requests to force high CPU usage, large transient memory allocations, and elevated garbage-collection pressure, leading to denial of service. This issue has been fixed in version 1.14.3.","modified":"2026-09-02T06:51:55Z","published":"2026-05-05T20:16:36Z","upstream":["CVE-2026-32936"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32936"}],"affected":[{"package":{"name":"coredns","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/coredns"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.4-17"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-85724.json"}}],"schema_version":"1.9.0"}