{"answers":{"affected":"2 open source packages ship an affected version, including tornado.","exploited":"There is no known exploitation of CVE-2023-54397 in the wild and no public exploit code.","fix":"Upgrade tornado to 6.3.3 or later.","what":"CVE-2023-54397 is a critical vulnerability in tornadoweb tornado, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-54397 and fix it if it is affected.\n\nWhat it is: CVE-2023-54397 is a critical vulnerability in tornadoweb tornado, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-54397 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- tornado (PyPI): affected all versions; fixed in 6.3.3\n- tornado (PyPI): affected all versions; fixed in 6.3.3\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-2023-54397/ (Markdown: https://insights.sbomify.com/CVE-2023-54397/index.md)","id":"CVE-2023-54397","markdown":"https://insights.sbomify.com/CVE-2023-54397/index.md","name":"CVE-2023-54397","record":{"aliases":["DEBIAN-CVE-2023-54397","GHSA-qppv-j76h-2rpx","GHSA-rhr2-ccgv-xvgx","ROOT-APP-PYPI-GHSA-qppv-j76h-2rpx","UBUNTU-CVE-2023-54397"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Python web framework","requires_auth":"none","summary":"Attackers can smuggle HTTP requests via malformed Content-Length headers in Tornado, bypassing proxy validation when deployed behind specific proxies.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"description":"Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies.","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 before 6.3.3 HTTP Request Smuggling via Content-Length","id":"CVE-2023-54397","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"other","year":"2023"},"n_packages":2,"n_references":2,"next":{"headline":"Yonyou U8 Cloud Java Deserialization RCE via FileManageServlet","id":"CVE-2023-54398"},"packages":[{"ecosystem":"PyPI","fixed":["6.3.3"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":null,"source":"GHSA-qppv-j76h-2rpx"},{"ecosystem":"PyPI","fixed":["6.3.3"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":"pkg:pypi/tornado","source":"GHSA-qppv-j76h-2rpx"}],"prev":{"headline":"PocketMine-MP before 4.8.1 Server Crash via Banner NBT","id":"CVE-2023-54396"},"products":["tornado"],"published":"2026-09-15","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["tornadoweb"]},"summary":"Attackers can smuggle HTTP requests via malformed Content-Length headers in Tornado, bypassing proxy validation when deployed behind specific proxies.","url":"https://insights.sbomify.com/CVE-2023-54397/"}