{"answers":{"affected":"3 open source packages ship an affected version, including tornado.","exploited":"There is no known exploitation of CVE-2026-49853 in the wild and no public exploit code.","fix":"Upgrade tornado to 6.5.6 or later.","what":"CVE-2026-49853 is a high-severity vulnerability in tornadoweb tornado, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-49853 and fix it if it is affected.\n\nWhat it is: CVE-2026-49853 is a high-severity vulnerability in tornadoweb tornado, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-49853 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- tornado (PyPI): affected all versions; fixed in 6.5.6\n- tornado (PyPI): affected all versions; fixed in 6.5.6\n- tornado (PyPI): affected all versions; fixed in 6.5.6\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-2026-49853/ (Markdown: https://insights.sbomify.com/CVE-2026-49853/index.md)","id":"CVE-2026-49853","markdown":"https://insights.sbomify.com/CVE-2026-49853/index.md","name":"CVE-2026-49853","record":{"aliases":["AZL-92504","BELL-CVE-2026-49853","CLEANSTART-2026-MS01738","DEBIAN-CVE-2026-49853","ECHO-a103-ffdd-56f3","GHSA-3x9g-8vmp-wqvf","MINI-c28j-6h7q-8xvg","MINI-chrw-3h2m-g6vr","MINI-fj6x-rrhh-2wcq","MINI-gqrc-3hc7-7w8q","MINI-hg77-9j6h-xcwc","MINI-hqfc-f2jx-82vm","MINI-jmvh-4qgq-37rx","MINI-jpjv-5c3p-jm79","MINI-qwwr-58hp-3wqf","PYSEC-2026-3387","ROOT-APP-PYPI-CVE-2026-49853","UBUNTU-CVE-2026-49853"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Python web framework","requires_auth":"low_privilege","summary":"Attackers can steal sensitive authorization credentials when the Tornado HTTP client follows cross-origin redirects.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6.","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: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient","id":"CVE-2026-49853","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Tornado: Out-of-bounds memory access in C extension","id":"CVE-2026-49854"},"packages":[{"ecosystem":"PyPI","fixed":["6.5.6"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":null,"source":"GHSA-3x9g-8vmp-wqvf"},{"ecosystem":"PyPI","fixed":["6.5.6"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":"pkg:pypi/tornado","source":"GHSA-3x9g-8vmp-wqvf"},{"ecosystem":"PyPI","fixed":["6.5.6"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":"pkg:pypi/tornado","source":"PYSEC-2026-3387"}],"prev":{"headline":"joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)","id":"CVE-2026-49852"},"products":["tornado"],"published":"2026-07-14","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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"2026-07-21","vendors":["tornadoweb"]},"summary":"Attackers can steal sensitive authorization credentials when the Tornado HTTP client follows cross-origin redirects.","url":"https://insights.sbomify.com/CVE-2026-49853/"}