{"schema":"threatline.record/2","record":{"id":"CVE-2026-83813","aliases":["GHSA-jj36-9pvh-vj5r"],"summary":"Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation","details":"Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.names.dns.DNSDatagramProtocol accepts a UDP DNS response for a pending query when its 16-bit transaction ID matches but does not verify that the response came from the queried host and port. An attacker able to deliver a packet to the resolver's listening port with the correct transaction ID can inject a forged answer. The standard twisted.names.client.Resolver uses a new random source port for each query, increasing off-path attack complexity, while applications that reuse a DNSDatagramProtocol instance expose only the transaction-ID search space after the first query. A successful forgery can redirect hostname resolution and enable mail interception, server-side request forgery, or man-in-the-middle positioning. This issue is fixed in version 26.10.0rc1.","categories":["Unclassified"],"product":"twisted","vendor":"twisted","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-83813","source_modified_at":"2026-10-23T20:21:54.364Z","fetched_at":"2026-10-23T20:37:03.234832Z","product":"twisted","vendor":"twisted","versions":[{"status":"affected","version":"< 26.7.0rc1"}],"defaultStatus":null}],"fixed_versions":[],"cvss":3.1,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00162,"percentile":0.05057,"score_date":"2026-10-24"},"published_at":"2026-10-23T20:21:54.364Z","modified_at":"2026-10-23T20:21:54.364Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-83813","fetched_at":"2026-10-23T20:37:03.234832Z","source_modified_at":"2026-10-23T20:21:54.364Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-83813","fetched_at":"2026-10-24T18:03:20.872036Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/twisted/twisted/security/advisories/GHSA-jj36-9pvh-vj5r","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/twisted/twisted/pull/12700","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/twisted/twisted/commit/b53e1c3477c209b5609a1c74cf9e48373b5879ac","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T20:21:54.364Z","content_hash":"f58a32302eae11df016357c69b296b1e95846ff60d74e81a629f8d06db199684"}}