{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-115877", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-23T19:37:27.176Z", "datePublished": "2026-10-23T20:25:12.031Z", "dateUpdated": "2026-10-23T20:25:12.031Z"}, "containers": {"cna": {"title": "Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value", "problemTypes": [{"descriptions": [{"cweId": "CWE-444", "lang": "en", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/twisted/twisted/security/advisories/GHSA-q7qq-6mhp-9rc4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/twisted/twisted/security/advisories/GHSA-q7qq-6mhp-9rc4"}, {"name": "https://github.com/twisted/twisted/pull/12755", "tags": ["x_refsource_MISC"], "url": "https://github.com/twisted/twisted/pull/12755"}, {"name": "https://github.com/twisted/twisted/commit/022b6f7feb5980166c71f54e2c0d8f4f21ff6e1a", "tags": ["x_refsource_MISC"], "url": "https://github.com/twisted/twisted/commit/022b6f7feb5980166c71f54e2c0d8f4f21ff6e1a"}, {"name": "https://github.com/twisted/twisted/commit/1616f702d36eda8990a5a5b22ad70fab140a7eb1", "tags": ["x_refsource_MISC"], "url": "https://github.com/twisted/twisted/commit/1616f702d36eda8990a5a5b22ad70fab140a7eb1"}, {"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": "< 26.10.0rc1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-23T20:25:12.031Z"}, "descriptions": [{"lang": "en", "value": "Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.web.http.HTTPChannel.headerReceived rejects a NUL byte in an HTTP header value but accepts a bare carriage return or bare line feed. Because Twisted splits header lines only on CRLF, a hidden Content-Length header can remain folded into another value while a lenient front end treats the bare character as a line terminator. The resulting framing disagreement can smuggle a following request past front-end access controls, poison a shared connection or cache, and expose a later client to the wrong response. This issue is an incomplete-fix residual of earlier Twisted request-smuggling protections. This issue is fixed in version 26.10.0rc1."}], "source": {"advisory": "GHSA-q7qq-6mhp-9rc4", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "twisted", "vendor": "twisted", "versions": [{"status": "affected", "version": "< 26.10.0rc1"}]}], "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.web.http.HTTPChannel.headerReceived rejects a NUL byte in an HTTP header value but accepts a bare carriage return or bare line feed. Because Twisted splits header lines only on CRLF, a hidden Content-Length header can remain folded into another value while a lenient front end treats the bare character as a line terminator. The resulting framing disagreement can smuggle a following request past front-end access controls, poison a shared connection or cache, and expose a later client to the wrong response. This issue is an incomplete-fix residual of earlier Twisted request-smuggling protections. This issue is fixed in version 26.10.0rc1."}], "id": "CVE-2026-115877", "lastModified": "2026-10-23T21:17:23.643", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-23T21:17:23.643", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/twisted/twisted/commit/022b6f7feb5980166c71f54e2c0d8f4f21ff6e1a"}, {"source": "security-advisories@github.com", "url": "https://github.com/twisted/twisted/commit/1616f702d36eda8990a5a5b22ad70fab140a7eb1"}, {"source": "security-advisories@github.com", "url": "https://github.com/twisted/twisted/pull/12755"}, {"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-q7qq-6mhp-9rc4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"bugzilla": {"description": "twisted: Twisted: HTTP request smuggling via improper header delimiter handling", "id": "2560182", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2560182"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-444", "details": ["A flaw was found in Twisted. The HTTP server component improperly accepts bare carriage return or line feed characters within header values instead of enforcing strict line endings. A remote attacker can exploit this framing disagreement against an upstream proxy to conduct HTTP request smuggling. This flaw can allow attackers to bypass front-end access controls, poison shared connections or web caches, and expose sensitive responses meant for other clients."], "name": "CVE-2026-115877", "package_state": [{"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Out of support scope", "package_name": "ansible-automation-platform-24/controller-rhel8", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Out of support scope", "package_name": "ansible-automation-platform-25/controller-rhel8", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Out of support scope", "package_name": "ansible-automation-platform-25/lightspeed-rhel8", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/controller-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/eda-controller-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/lightspeed-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-27/controller-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-27/eda-controller-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-27/lightspeed-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "automation-controller", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "python3.11-twisted", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "python3.12-twisted", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Out of support scope", "package_name": "python3x-twisted", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Out of support scope", "package_name": "python-twisted", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Out of support scope", "package_name": "python-twisted", "product_name": "Red Hat OpenStack Platform 16.2"}], "public_date": "2026-10-23T20:25:12Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-115877\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-115877\nhttps://github.com/twisted/twisted/commit/022b6f7feb5980166c71f54e2c0d8f4f21ff6e1a\nhttps://github.com/twisted/twisted/commit/1616f702d36eda8990a5a5b22ad70fab140a7eb1\nhttps://github.com/twisted/twisted/pull/12755\nhttps://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1\nhttps://github.com/twisted/twisted/security/advisories/GHSA-q7qq-6mhp-9rc4"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,26.10.0rc1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "twisted", "source": "cna", "vendor": "twisted"}, "product": "twisted", "vendor": "twisted"}], "created": "2026-10-23T22:00:28.537770+00:00", "updated": "2026-10-23T22:45:14.280806+00:00", "vendors": ["twisted", "twisted$PRODUCT$twisted"]}