{"answers":{"affected":"2 open source packages ship an affected version, including Twisted and twisted.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-115877 exists.","fix":"Upgrade Twisted to 26.10.0rc1 or later.","what":"CVE-2026-115877 is a medium-severity vulnerability in twisted, published on 23 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115877 and fix it if it is affected.\n\nWhat it is: CVE-2026-115877 is a medium-severity vulnerability in twisted, published on 23 Oct 2026. \nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-115877 exists.\n\nAffected packages and fixed versions:\n- Twisted (PyPI): affected all versions; fixed in 26.10.0rc1\n- twisted (PyPI): affected all versions; fixed in 26.10.0rc1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-115877/ (Markdown: https://insights.sbomify.com/CVE-2026-115877/index.md)","id":"CVE-2026-115877","markdown":"https://insights.sbomify.com/CVE-2026-115877/index.md","name":"CVE-2026-115877","record":{"aliases":["AZL-111407","DEBIAN-CVE-2026-115877","ECHO-73bd-6fda-55fe","GHSA-q7qq-6mhp-9rc4","UBUNTU-CVE-2026-115877"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"description":"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.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value","id":"CVE-2026-115877","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":5,"next":{"headline":"LangGraph: Namespace labels containing `.` reach other namespaces in Postgres and SQLite stores","id":"CVE-2026-115883"},"packages":[{"ecosystem":"PyPI","fixed":["26.10.0rc1"],"introduced":["0"],"last_affected":[],"package":"Twisted","purl":null,"source":"GHSA-q7qq-6mhp-9rc4"},{"ecosystem":"PyPI","fixed":["26.10.0rc1"],"introduced":["0"],"last_affected":[],"package":"twisted","purl":"pkg:pypi/twisted","source":"GHSA-q7qq-6mhp-9rc4"}],"prev":{"headline":"ConnMan through 2.0 has a stack-based buffer overflow via a DHCPv6 Reply message.","id":"CVE-2026-115863"},"products":["twisted"],"published":"2026-10-23","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["twisted"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115877/"}