{"id":"CVE-2026-83813","revision":null,"records":[{"revision":"0160d6f81235415e807c46a74dd3d5d9","observedAt":"2026-10-23T21:48:20.592+00:00","statement":{"source":"cve-program","id":"CVE-2026-83813","aliases":[],"title":"Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation","description":"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.","state":0,"publishedAt":"2026-10-23T20:21:54.364+00:00","modifiedAt":"2026-10-23T20:21:54.364+00:00","affected":[{"ecosystem":"Vendor product","name":"twisted","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"twisted\",\n                    \"product\": \"twisted\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 26.7.0rc1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.1,"severity":"LOW"}],"references":["https://github.com/twisted/twisted/security/advisories/GHSA-jj36-9pvh-vj5r","https://github.com/twisted/twisted/pull/12700","https://github.com/twisted/twisted/commit/b53e1c3477c209b5609a1c74cf9e48373b5879ac","https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-83813","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-83813","identifiers":["CVE-2026-83813"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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