{"items":[{"id":"NVI-00010113","kind":"vulnerability","title":"Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-q7qq-6mhp-9rc4","CVE-2026-115877"],"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-229644c460571e26e736e424e6338585"],"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":"2026-10-23T20:44:44.000Z","value":"5.4 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-17982be1b28ae86ead257e1b02e92a98"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.257%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.17339. Missing scores are unknown.","source_id":"sr-229644c460571e26e736e424e6338585"}],"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-17982be1b28ae86ead257e1b02e92a98","url":"https://github.com/advisories/GHSA-q7qq-6mhp-9rc4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-q7qq-6mhp-9rc4","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:08.657Z"},{"id":"sr-229644c460571e26e736e424e6338585","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-2026-115877","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.842Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-17982be1b28ae86ead257e1b02e92a98"],"technology":"Twisted","known_exclusions":[],"conditions_summary":"## Summary\n\nAn incomplete header-value validation (CWE-444) in the Twisted HTTP server lets a bare carriage return or line feed in a header value hide a following header from the parser. `twisted.web.http.HTTPChannel.headerReceived` rejects a NUL byte in a header value but not a bare CR or LF, even though RFC 9110 section 5.5 requires a recipient to reject all three. Because the channel splits requests only on CRLF, a value carrying a bare LF and a second header arrives as one line, so the second header is folded into the value and the request is framed with no body. A front-end that treats the bare LF as a line terminator frames the request differently, and the disagreement lets an attacker smuggle a request past it. This is an incomplete fix of the earlier Twisted request-smuggling advisories, which guarded the NUL sibling of this exact check.\n\n## Details\n\n`headerReceived` splits a header line on the first colon, strips space and tab from the value, and validates it with a single test that rejects only NUL:\n\n```python\n# twisted/web/http.py  HTTPChannel.headerReceived\ndata = data.strip(b\" \\t\")\nif b\"\\x00\" in data:          # NUL rejected; a bare CR or LF is not\n    self._respondToB","public_affected_ranges":["<= 26.4.0"]}],"null_published_at":"2026-11-07T14:01:58.741Z","source_updated_at":"2026-10-23T20:44:44.000Z","source_disclosed_at":"2026-10-23T20:44:43.000Z","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":"2026-10-31T22:07:08.657Z"},{"id":"NVI-00010113","kind":"vulnerability","title":"Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-q7qq-6mhp-9rc4","CVE-2026-115877"],"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-a801a82b60b7710293edc53f30338c23"],"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":"2026-10-23T20:44:44.000Z","value":"5.4 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-17982be1b28ae86ead257e1b02e92a98"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.257%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.17364. Missing scores are unknown.","source_id":"sr-a801a82b60b7710293edc53f30338c23"}],"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-17982be1b28ae86ead257e1b02e92a98","url":"https://github.com/advisories/GHSA-q7qq-6mhp-9rc4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-q7qq-6mhp-9rc4","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:08.657Z"},{"id":"sr-a801a82b60b7710293edc53f30338c23","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-2026-115877","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:20:46.854Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-17982be1b28ae86ead257e1b02e92a98"],"technology":"Twisted","known_exclusions":[],"conditions_summary":"## Summary\n\nAn incomplete header-value validation (CWE-444) in the Twisted HTTP server lets a bare carriage return or line feed in a header value hide a following header from the parser. `twisted.web.http.HTTPChannel.headerReceived` rejects a NUL byte in a header value but not a bare CR or LF, even though RFC 9110 section 5.5 requires a recipient to reject all three. Because the channel splits requests only on CRLF, a value carrying a bare LF and a second header arrives as one line, so the second header is folded into the value and the request is framed with no body. A front-end that treats the bare LF as a line terminator frames the request differently, and the disagreement lets an attacker smuggle a request past it. This is an incomplete fix of the earlier Twisted request-smuggling advisories, which guarded the NUL sibling of this exact check.\n\n## Details\n\n`headerReceived` splits a header line on the first colon, strips space and tab from the value, and validates it with a single test that rejects only NUL:\n\n```python\n# twisted/web/http.py  HTTPChannel.headerReceived\ndata = data.strip(b\" \\t\")\nif b\"\\x00\" in data:          # NUL rejected; a bare CR or LF is not\n    self._respondToB","public_affected_ranges":["<= 26.4.0"]}],"null_published_at":"2026-11-05T03:53:06.259Z","source_updated_at":"2026-10-23T20:44:44.000Z","source_disclosed_at":"2026-10-23T20:44:43.000Z","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":"2026-10-31T22:07:08.657Z"},{"id":"NVI-00010113","kind":"vulnerability","title":"Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-q7qq-6mhp-9rc4","CVE-2026-115877"],"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-17982be1b28ae86ead257e1b02e92a98"],"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":"2026-10-23T20:44:44.000Z","value":"5.4 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-17982be1b28ae86ead257e1b02e92a98"}],"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-17982be1b28ae86ead257e1b02e92a98","url":"https://github.com/advisories/GHSA-q7qq-6mhp-9rc4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-q7qq-6mhp-9rc4","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:08.657Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-17982be1b28ae86ead257e1b02e92a98"],"technology":"Twisted","known_exclusions":[],"conditions_summary":"## Summary\n\nAn incomplete header-value validation (CWE-444) in the Twisted HTTP server lets a bare carriage return or line feed in a header value hide a following header from the parser. `twisted.web.http.HTTPChannel.headerReceived` rejects a NUL byte in a header value but not a bare CR or LF, even though RFC 9110 section 5.5 requires a recipient to reject all three. Because the channel splits requests only on CRLF, a value carrying a bare LF and a second header arrives as one line, so the second header is folded into the value and the request is framed with no body. A front-end that treats the bare LF as a line terminator frames the request differently, and the disagreement lets an attacker smuggle a request past it. This is an incomplete fix of the earlier Twisted request-smuggling advisories, which guarded the NUL sibling of this exact check.\n\n## Details\n\n`headerReceived` splits a header line on the first colon, strips space and tab from the value, and validates it with a single test that rejects only NUL:\n\n```python\n# twisted/web/http.py  HTTPChannel.headerReceived\ndata = data.strip(b\" \\t\")\nif b\"\\x00\" in data:          # NUL rejected; a bare CR or LF is not\n    self._respondToB","public_affected_ranges":["<= 26.4.0"]}],"null_published_at":"2026-10-31T22:13:48.415Z","source_updated_at":"2026-10-23T20:44:44.000Z","source_disclosed_at":"2026-10-23T20:44:43.000Z","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":"2026-10-31T22:07:08.657Z"}],"next_cursor":null,"snapshot_revision":"40769"}