{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-126347 in the wild and no public exploit code.","exposure":"An affected version is only exploitable if your software calls tornado.web.RedirectHandler. Many projects that include it are not exposed.","fix":"No fix has been published for CVE-2026-126347 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-126347 is a low-severity open redirect vulnerability in tornadoweb tornado, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-126347 and fix it if it is affected.\n\nWhat it is: CVE-2026-126347 is a low-severity open redirect vulnerability in tornadoweb tornado, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-126347 in the wild and no public exploit code.\nExposure: An affected version is only exploitable if your software calls tornado.web.RedirectHandler. Many projects that include it are not exposed.\n\nAffected product: tornadoweb tornado. No package-level version data is available, so check the vendor advisory linked from the reference page.\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.\n   If an affected version is present, also search the code for calls to tornado.web.RedirectHandler and report whether any exist.\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-2026-126347/ (Markdown: https://insights.sbomify.com/CVE-2026-126347/index.md)","id":"CVE-2026-126347","markdown":"https://insights.sbomify.com/CVE-2026-126347/index.md","name":"CVE-2026-126347","record":{"aliases":["GHSA-5cjw-f85j-cv6r"],"analysis":{"component_type":"library","exploitable_when_present":false,"fix_type":"upgrade","impacts":["other"],"network_reachable":"yes","non_default_config":true,"product_category":"Python web framework","requires_auth":"none","requires_specific_call":true,"summary":"Attackers can craft triple-slash redirect destinations in Tornado apps using URL templates to send users to attacker-controlled hosts.","user_interaction":"required","vuln_class":"open_redirect","vulnerable_functions":["tornado.web.RedirectHandler"]},"analysis_generated_by":"sbomify/insights-2b-fp8","assigner":"GitHub_M","cpe":[],"cvss":{"score":3.1,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"Tornado is a Python web framework and asynchronous networking library. In versions through 6.6.0, applications using  tornado.web.RedirectHandler  with URL templates that allow attacker-controlled substitutions to influence the destination can be vulnerable to an open redirect using three or more leading slashes. Differences between Python’s URL parsing and browser URL interpretation allow a crafted destination to redirect a user to an attacker-controlled host. The remediation for CVE-2026-116578 in version 6.6.0 did not fully address this case. This issue is fixed in version 6.6.1.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Tornado: Open redirect via triple-slash redirect paths","id":"CVE-2026-126347","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"open_redirect","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Addressable display_uri can show misleading hosts with invalid Punycode A-labels","id":"CVE-2026-126348"},"nickname":null,"packages":[],"prev":{"headline":"basic-ftp: Uncaught exception crashes the Node.js process when a password (or resumed-download path) contains CR/LF","id":"CVE-2026-126346"},"products":["tornado"],"published":"2026-11-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-11-12","vendors":["tornadoweb"]},"summary":"Attackers can craft triple-slash redirect destinations in Tornado apps using URL templates to send users to attacker-controlled hosts.","url":"https://insights.sbomify.com/CVE-2026-126347/"}