{"answers":{"affected":"2 open source packages ship an affected version, including tornado.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103263 exists.","fix":"Upgrade tornado to 6.5.9 or later.","what":"CVE-2026-103263 is a high-severity path traversal vulnerability in tornadoweb tornado, published on 1 Oct 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-2026-103263 and fix it if it is affected.\n\nWhat it is: CVE-2026-103263 is a high-severity path traversal vulnerability in tornadoweb tornado, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103263 exists.\n\nAffected packages and fixed versions:\n- tornado (PyPI): affected all versions; fixed in 6.5.9\n- tornado (PyPI): affected all versions; fixed in 6.5.9\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-2026-103263/ (Markdown: https://insights.sbomify.com/CVE-2026-103263/index.md)","id":"CVE-2026-103263","markdown":"https://insights.sbomify.com/CVE-2026-103263/index.md","name":"CVE-2026-103263","record":{"aliases":["AZL-105375","BELL-CVE-2026-103263","CLEANSTART-2026-YE37392","DEBIAN-CVE-2026-103263","ECHO-dd3a-7510-fb48","GHSA-4cjq-6jh9-w2f5","GHSA-c2m8-h5v5-343r","MINI-23w9-p73w-wgvh","MINI-36h2-cmq9-m7hc","MINI-377x-37mv-8p9w","MINI-3h78-rm7j-cfwr","MINI-3r36-xr77-6jrv","MINI-4f25-m979-w295","MINI-4vq8-x2cx-68cv","MINI-59j3-vqvw-6rpg","MINI-6gj6-83x4-8f6q","MINI-8qmg-vm4m-7m9m","MINI-c496-v69q-rmrx","MINI-f494-q7hg-jvqm","MINI-fg5v-6723-jcf5","MINI-fp66-4x4c-28ph","MINI-g354-9hj6-q97f","MINI-g4pr-v925-r3jg","MINI-jqff-5j24-cfw3","MINI-jwrm-r9rw-x5r3","MINI-pfh9-24hg-qfwc","MINI-pj2j-2qxw-4j3m","MINI-pvgp-hg38-pxgw","ROOT-APP-PYPI-GHSA-c2m8-h5v5-343r","UBUNTU-CVE-2026-103263"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Python web framework","requires_auth":"none","summary":"Unauthenticated attackers can read arbitrary files outside the static directory via symlink traversal in Tornado's StaticFileHandler.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink","id":"CVE-2026-103263","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Fleet before 4.87.0 Authentication Bypass via Device Identifiers","id":"CVE-2026-103264"},"packages":[{"ecosystem":"PyPI","fixed":["6.5.9"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":null,"source":"GHSA-c2m8-h5v5-343r"},{"ecosystem":"PyPI","fixed":["6.5.9"],"introduced":["0"],"last_affected":[],"package":"tornado","purl":"pkg:pypi/tornado","source":"GHSA-c2m8-h5v5-343r"}],"prev":{"headline":"Tornado before 6.5.9 Denial of Service via CurlAsyncHTTPClient","id":"CVE-2026-103262"},"products":["tornado"],"published":"2026-10-01","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["tornadoweb"]},"summary":"Unauthenticated attackers can read arbitrary files outside the static directory via symlink traversal in Tornado's StaticFileHandler.","url":"https://insights.sbomify.com/CVE-2026-103263/"}