{"answers":{"affected":"2 open source packages ship an affected version, including tornado.","exploited":"There is no known exploitation of CVE-2026-116578 in the wild and no public exploit code.","fix":"Upgrade tornado to 6.6 or later.","what":"CVE-2026-116578 is a low-severity vulnerability in tornadoweb tornado, published on 26 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-116578 and fix it if it is affected.\n\nWhat it is: CVE-2026-116578 is a low-severity vulnerability in tornadoweb tornado, published on 26 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-116578 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-2026-116578/ (Markdown: https://insights.sbomify.com/CVE-2026-116578/index.md)","id":"CVE-2026-116578","markdown":"https://insights.sbomify.com/CVE-2026-116578/index.md","name":"CVE-2026-116578","record":{"aliases":["DEBIAN-CVE-2026-116578","ECHO-b1d7-e956-461d","GHSA-pw9p-v7r6-gx4p","MINI-jqj6-pmxg-jwwj","UBUNTU-CVE-2026-116578"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":2.1,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, tornado.web.RedirectHandler URL templates can place regex-capture substitutions where crafted request paths change the redirect scheme or network location. Affected placements include substitutions at the start of a path, directly after a fixed host, or at the beginning of the template, including protocol-relative, absolute, backslash, encoded, host-extension, and user-info variants interpreted by browsers as attacker-controlled destinations. Static templates and substitutions after a fixed host followed by a slash are not affected. An attacker can use the resulting open redirect on the application's domain for phishing. This issue is fixed in version 6.6.","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: Open redirect in RedirectHandler via protocol-relative URLs","id":"CVE-2026-116578","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":6,"next":{"headline":"Autobahn Python: permessage-brotli inflates a whole frame before maxMessagePayloadSize is checked (incomplete fix of GHSA-hxp9-w8x3-p566)","id":"CVE-2026-116579"},"packages":[{"ecosystem":"PyPI","fixed":["6.6"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":null,"source":"GHSA-pw9p-v7r6-gx4p"},{"ecosystem":"PyPI","fixed":["6.6"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":"pkg:pypi/tornado","source":"GHSA-pw9p-v7r6-gx4p"}],"prev":{"headline":"Tornado: Quadratic CPU usage when parsing HTTP headers with line folding","id":"CVE-2026-116577"},"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-26","vendors":["tornadoweb"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-116578/"}