{"id":"CVE-2026-40011","summary":"Prometheus denial of service via crafted DNS queries","details":"An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output to be produced in the prometheus endpoint. The prometheus endpoint will then be rejected by the scraper until the dynamic block expires.","modified":"2026-07-15T15:30:17.367481Z","published":"2026-06-25T12:22:19.248Z","database_specific":{"cna_assigner":"OX","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40011.json"},"references":[{"type":"WEB","url":"https://repo.powerdns.com/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40011.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40011"},{"type":"ADVISORY","url":"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html"},{"type":"PACKAGE","url":"https://github.com/PowerDNS/pdns"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/powerdns/pdns","events":[{"introduced":"298a9d67fb760a12eabe89164f92fb814572aea8"},{"fixed":"3348a4f5e1ea95ed90ad6bbdf9c7f12be72e9bfc"},{"introduced":"89747e81bc60d7950276d5fda3ca669fa81b7cf9"},{"fixed":"5bd46a775a7d72376c6a22b2313173a187d439dd"}],"database_specific":{"extracted_events":[{"introduced":"1.9.0"},{"fixed":"1.9.15"},{"introduced":"2.0.0"},{"fixed":"2.0.7"}],"source":"AFFECTED_FIELD"}}],"versions":["dnsdist-1.9.14","dnsdist-2.0.6","dnsdist-2.0.5","dnsdist-2.0.2","dnsdist-2.0.1","dnsdist-1.9.11","dnsdist-2.0.0","dnsdist-1.9.10","dnsdist-1.9.9","dnsdist-1.9.8","dnsdist-1.9.7","dnsdist-1.9.6","dnsdist-1.9.5","dnsdist-1.9.4","dnsdist-1.9.3","dnsdist-1.9.2","dnsdist-1.9.1","dnsdist-1.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40011.json","vanir_signatures_modified":"2026-07-15T15:30:17Z","vanir_signatures":[{"digest":{"function_hash":"175905571297022484819797437345790495302","length":6030},"id":"CVE-2026-40011-39fe2f8e","signature_type":"Function","signature_version":"v1","source":"https://github.com/powerdns/pdns/commit/3348a4f5e1ea95ed90ad6bbdf9c7f12be72e9bfc","target":{"file":"ext/yahttp/yahttp/reqresp.cpp","function":"feed"},"deprecated":false},{"signature_type":"Line","signature_version":"v1","source":"https://github.com/powerdns/pdns/commit/3348a4f5e1ea95ed90ad6bbdf9c7f12be72e9bfc","target":{"file":"ext/yahttp/yahttp/reqresp.cpp"},"deprecated":false,"digest":{"line_hashes":["146073261330685155030523374299187221356","139999140489202660150035160998558678530","260398486233326308600521181399778936346","178066237530059398734757326132960946649"],"threshold":0.9},"id":"CVE-2026-40011-5ad4401b"},{"signature_version":"v1","source":"https://github.com/powerdns/pdns/commit/5bd46a775a7d72376c6a22b2313173a187d439dd","target":{"file":"ext/yahttp/yahttp/reqresp.cpp"},"deprecated":false,"digest":{"line_hashes":["146073261330685155030523374299187221356","139999140489202660150035160998558678530","260398486233326308600521181399778936346","178066237530059398734757326132960946649"],"threshold":0.9},"id":"CVE-2026-40011-8834b793","signature_type":"Line"},{"signature_version":"v1","source":"https://github.com/powerdns/pdns/commit/5bd46a775a7d72376c6a22b2313173a187d439dd","target":{"file":"ext/yahttp/yahttp/reqresp.cpp","function":"feed"},"deprecated":false,"digest":{"length":6074,"function_hash":"237403263111315157988973709551044007080"},"id":"CVE-2026-40011-f428faf8","signature_type":"Function"}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}