{"answers":{"affected":"2 open source packages ship an affected version, including tornado.","exploited":"There is no known exploitation of CVE-2026-115927 in the wild and no public exploit code.","fix":"Upgrade tornado to 6.6 or later.","what":"CVE-2026-115927 is a medium-severity vulnerability in tornadoweb tornado, published on 26 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115927 and fix it if it is affected.\n\nWhat it is: CVE-2026-115927 is a medium-severity vulnerability in tornadoweb tornado, published on 26 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-115927 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- tornado (PyPI): affected all versions; fixed in 6.6\n- tornado (PyPI): affected all versions; fixed in 6.6\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-2026-115927/ (Markdown: https://insights.sbomify.com/CVE-2026-115927/index.md)","id":"CVE-2026-115927","markdown":"https://insights.sbomify.com/CVE-2026-115927/index.md","name":"CVE-2026-115927","record":{"aliases":["DEBIAN-CVE-2026-115927","ECHO-cb4d-5419-928b","GHSA-r4j5-9xpp-3985","MINI-f59q-3xqm-769h","UBUNTU-CVE-2026-115927"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Tornado is a Python web framework and asynchronous networking library. Prior to 6.6.0, Tornado decodes HTTP/1.1 chunked transfer encoding by processing body data that has already arrived without yielding to the event loop. A remote unauthenticated peer can send millions of one-byte chunks to monopolize the process event loop and stall every other connection served by that process, while lowering max_body_size only limits the duration of each request. For handlers that do not use @stream_request_body, retaining each chunk as a separate object can consume roughly twenty times the received body size, and SimpleAsyncHTTPClient has the same event-loop behavior when reading a response from a malicious server. This issue is fixed in version 6.6.0.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Tornado: Event loop blocking and excess memory use from chunked bodies with many small chunks","id":"CVE-2026-115927","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"MongoDB Compass trusts certificates issued by recoverable eMudhra intermediate CAs","id":"CVE-2026-115929"},"packages":[{"ecosystem":"PyPI","fixed":["6.6"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":null,"source":"GHSA-r4j5-9xpp-3985"},{"ecosystem":"PyPI","fixed":["6.6"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":"pkg:pypi/tornado","source":"GHSA-r4j5-9xpp-3985"}],"prev":{"headline":"Rembg: Unauthenticated SAM model injection permits local-file disclosure through malicious ONNX graphs","id":"CVE-2026-115924"},"products":["tornado"],"published":"2026-10-26","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-27","vendors":["tornadoweb"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115927/"}