{"items":[{"id":"NVI-00010652","kind":"vulnerability","title":"Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jj36-9pvh-vj5r","CVE-2026-83813"],"plain_summary":"GitHub lists this reviewed advisory for Twisted. 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-0cbee8d9cd471241d8d7fe5c85d4595e"],"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":"2026-10-27T14:45:30.000Z","value":"3.1 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-89fb5019ef8d9415e485fd873b6c0533"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.114%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.01491. Missing scores are unknown.","source_id":"sr-0cbee8d9cd471241d8d7fe5c85d4595e"}],"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-89fb5019ef8d9415e485fd873b6c0533","url":"https://github.com/advisories/GHSA-jj36-9pvh-vj5r","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jj36-9pvh-vj5r","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-0cbee8d9cd471241d8d7fe5c85d4595e","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-83813","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:17:01.143Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-89fb5019ef8d9415e485fd873b6c0533"],"technology":"Twisted","known_exclusions":[],"conditions_summary":"### Summary\n\n`twisted.names.dns.DNSDatagramProtocol`, the UDP transport used by twisted's DNS client (`twisted.names.client.Resolver`, `createResolver`, and anything built on it, including MX lookups in `twisted.mail`), accepts a DNS response for a pending query solely on the basis of the 16-bit transaction ID matching. It never checks that the response actually originated from the server the query was sent to. Any host that can deliver a UDP packet to the resolver's listening port with the correct transaction ID can inject a forged answer, independent of the real server's address. This is a materially weaker defense than standard DNS resolver practice (transaction ID plus source-address validation, typically also source-port rotation), and enables off-path DNS response spoofing / cache poisoning.\n\n### Details\n\n`DNSDatagramProtocol.datagramReceived` (`src/twisted/names/dns.py`, line 3350) is:\n\n```python\ndef datagramReceived(self, data, addr):\n    \"\"\"\n    Read a datagram, extract the message in it and trigger the associated\n    Deferred.\n    \"\"\"\n    m = Message()\n    try:\n        m.fromStr(data)\n    except EOFError:\n        ...\n    except ValueError as ex:\n        ...\n    except Bas","public_affected_ranges":["<= 26.4.0"]}],"null_published_at":"2026-11-04T10:04:47.588Z","source_updated_at":"2026-10-27T14:45:30.000Z","source_disclosed_at":"2026-10-27T14:45:29.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010652","kind":"vulnerability","title":"Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jj36-9pvh-vj5r","CVE-2026-83813"],"plain_summary":"GitHub lists this reviewed advisory for Twisted. 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-6ab0d5f0945f89a108f20695725cbd6e"],"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":"2026-10-27T14:45:30.000Z","value":"3.1 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-89fb5019ef8d9415e485fd873b6c0533"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.114%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.01495. Missing scores are unknown.","source_id":"sr-6ab0d5f0945f89a108f20695725cbd6e"}],"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-89fb5019ef8d9415e485fd873b6c0533","url":"https://github.com/advisories/GHSA-jj36-9pvh-vj5r","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jj36-9pvh-vj5r","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-6ab0d5f0945f89a108f20695725cbd6e","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-83813","publisher":"FIRST EPSS","observed_at":"2026-10-31T23:13:27.700Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-89fb5019ef8d9415e485fd873b6c0533"],"technology":"Twisted","known_exclusions":[],"conditions_summary":"### Summary\n\n`twisted.names.dns.DNSDatagramProtocol`, the UDP transport used by twisted's DNS client (`twisted.names.client.Resolver`, `createResolver`, and anything built on it, including MX lookups in `twisted.mail`), accepts a DNS response for a pending query solely on the basis of the 16-bit transaction ID matching. It never checks that the response actually originated from the server the query was sent to. Any host that can deliver a UDP packet to the resolver's listening port with the correct transaction ID can inject a forged answer, independent of the real server's address. This is a materially weaker defense than standard DNS resolver practice (transaction ID plus source-address validation, typically also source-port rotation), and enables off-path DNS response spoofing / cache poisoning.\n\n### Details\n\n`DNSDatagramProtocol.datagramReceived` (`src/twisted/names/dns.py`, line 3350) is:\n\n```python\ndef datagramReceived(self, data, addr):\n    \"\"\"\n    Read a datagram, extract the message in it and trigger the associated\n    Deferred.\n    \"\"\"\n    m = Message()\n    try:\n        m.fromStr(data)\n    except EOFError:\n        ...\n    except ValueError as ex:\n        ...\n    except Bas","public_affected_ranges":["<= 26.4.0"]}],"null_published_at":"2026-11-01T22:58:19.140Z","source_updated_at":"2026-10-27T14:45:30.000Z","source_disclosed_at":"2026-10-27T14:45:29.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010652","kind":"vulnerability","title":"Twisted: DNS Response Spoofing in twisted.names Due to Missing Source Address Validation","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jj36-9pvh-vj5r","CVE-2026-83813"],"plain_summary":"GitHub lists this reviewed advisory for Twisted. 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-89fb5019ef8d9415e485fd873b6c0533"],"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":"2026-10-27T14:45:30.000Z","value":"3.1 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-89fb5019ef8d9415e485fd873b6c0533"}],"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-89fb5019ef8d9415e485fd873b6c0533","url":"https://github.com/advisories/GHSA-jj36-9pvh-vj5r","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jj36-9pvh-vj5r","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-89fb5019ef8d9415e485fd873b6c0533"],"technology":"Twisted","known_exclusions":[],"conditions_summary":"### Summary\n\n`twisted.names.dns.DNSDatagramProtocol`, the UDP transport used by twisted's DNS client (`twisted.names.client.Resolver`, `createResolver`, and anything built on it, including MX lookups in `twisted.mail`), accepts a DNS response for a pending query solely on the basis of the 16-bit transaction ID matching. It never checks that the response actually originated from the server the query was sent to. Any host that can deliver a UDP packet to the resolver's listening port with the correct transaction ID can inject a forged answer, independent of the real server's address. This is a materially weaker defense than standard DNS resolver practice (transaction ID plus source-address validation, typically also source-port rotation), and enables off-path DNS response spoofing / cache poisoning.\n\n### Details\n\n`DNSDatagramProtocol.datagramReceived` (`src/twisted/names/dns.py`, line 3350) is:\n\n```python\ndef datagramReceived(self, data, addr):\n    \"\"\"\n    Read a datagram, extract the message in it and trigger the associated\n    Deferred.\n    \"\"\"\n    m = Message()\n    try:\n        m.fromStr(data)\n    except EOFError:\n        ...\n    except ValueError as ex:\n        ...\n    except Bas","public_affected_ranges":["<= 26.4.0"]}],"null_published_at":"2026-10-31T22:27:09.627Z","source_updated_at":"2026-10-27T14:45:30.000Z","source_disclosed_at":"2026-10-27T14:45:29.000Z","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":"2026-10-31T22:06:46.371Z"}],"next_cursor":null,"snapshot_revision":"42594"}