{"items":[{"id":"NVI-00013979","kind":"vulnerability","title":"CoreDNS DoH/DoQ/gRPC bypass UPDATE rejection enforced on UDP/TCP","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9gm5-9rfh-m6vx","CVE-2026-86003"],"plain_summary":"GitHub lists this reviewed advisory for github.com/coredns/coredns. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2c18af8af4c3ec2e866da7d8c78f7cf3"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-09-17T20:33:07.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2c18af8af4c3ec2e866da7d8c78f7cf3"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2c18af8af4c3ec2e866da7d8c78f7cf3","url":"https://github.com/advisories/GHSA-9gm5-9rfh-m6vx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9gm5-9rfh-m6vx","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T14:29:49.409Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2c18af8af4c3ec2e866da7d8c78f7cf3"],"technology":"github.com/coredns/coredns","known_exclusions":[],"conditions_summary":"### Summary\n\nCoreDNS accepted RFC 2136 UPDATE messages over DoH, DoH3, DoQ, and DNS-over-gRPC, then allowed the `proxy`/`forward` plugin to send them unchanged to an upstream DNS server. UDP, TCP, and DoT rejected the same opcode before plugin dispatch.\n\nIf an update-capable upstream trusts CoreDNS's source address or authenticated connection instead of requiring end-to-end TSIG, an unauthenticated client can use CoreDNS to add, replace, or delete DNS records.\n\n### Details\n\nThe affected listeners called `dns.Msg.Unpack` without the request policy used by the UDP/TCP server:\n\n- DoH and DoH3\n- DoQ\n- DNS-over-gRPC\n\nCoreDNS routed the message using its Zone question without checking the opcode. [`forward`](https://github.com/coredns/coredns/blob/18a58b9e898ccd95c3f8ee72a37b95b3d1e","public_affected_ranges":["<= 1.14.6"]}],"null_published_at":"2026-11-02T10:00:37.193Z","source_updated_at":"2026-09-17T20:33:07.000Z","source_disclosed_at":"2026-09-17T20:33:05.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-01T14:29:49.409Z"}],"next_cursor":null,"snapshot_revision":"42594"}