{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-83813", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-31T23:04:48.173Z", "datePublished": "2026-10-23T20:21:54.364Z", "dateUpdated": "2026-10-23T20:21:54.364Z"}, "containers": {"cna": {"title": "Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation", "problemTypes": [{"descriptions": [{"cweId": "CWE-346", "lang": "en", "description": "CWE-346: Origin Validation Error", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/twisted/twisted/security/advisories/GHSA-jj36-9pvh-vj5r", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/twisted/twisted/security/advisories/GHSA-jj36-9pvh-vj5r"}, {"name": "https://github.com/twisted/twisted/pull/12700", "tags": ["x_refsource_MISC"], "url": "https://github.com/twisted/twisted/pull/12700"}, {"name": "https://github.com/twisted/twisted/commit/b53e1c3477c209b5609a1c74cf9e48373b5879ac", "tags": ["x_refsource_MISC"], "url": "https://github.com/twisted/twisted/commit/b53e1c3477c209b5609a1c74cf9e48373b5879ac"}, {"name": "https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1", "tags": ["x_refsource_MISC"], "url": "https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"}], "affected": [{"vendor": "twisted", "product": "twisted", "versions": [{"version": "< 26.7.0rc1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-23T20:21:54.364Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-jj36-9pvh-vj5r", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "twisted", "vendor": "twisted", "versions": [{"status": "affected", "version": "< 26.7.0rc1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-83813", "lastModified": "2026-10-23T21:17:25.287", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-23T21:17:25.287", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/twisted/twisted/commit/b53e1c3477c209b5609a1c74cf9e48373b5879ac"}, {"source": "security-advisories@github.com", "url": "https://github.com/twisted/twisted/pull/12700"}, {"source": "security-advisories@github.com", "url": "https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"}, {"source": "security-advisories@github.com", "url": "https://github.com/twisted/twisted/security/advisories/GHSA-jj36-9pvh-vj5r"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}