{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89040 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-89040 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-89040 is a critical path traversal vulnerability in Tencent Mass Service Engine in Cluster (MSEC), 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-2026-89040 and fix it if it is affected.\n\nWhat it is: CVE-2026-89040 is a critical path traversal vulnerability in Tencent Mass Service Engine in Cluster (MSEC), 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-2026-89040 in the wild and no public exploit code.\n\nAffected product: Tencent Mass Service Engine in Cluster (MSEC). 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.\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-2026-89040/ (Markdown: https://insights.sbomify.com/CVE-2026-89040/index.md)","id":"CVE-2026-89040","markdown":"https://insights.sbomify.com/CVE-2026-89040/index.md","name":"CVE-2026-89040","record":{"aliases":["GHSA-wfq6-vqf6-g78h"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Tencent MSEC","requires_auth":"none","summary":"Remote unauthenticated attackers can exploit path traversal to upload a webshell and execute arbitrary code with root privileges on Tencent MSEC devices.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisa-cg","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Tencent Mass Service Engine in Cluster (MSEC) allows a remote, unauthenticated attacker to send a crafted POST request including ../ and gain root access on the target device. An attacker who uploads a webshell can execute arbitrary code as root.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Tencent Mass Service Engine in Cluster (MSEC) path traversal","id":"CVE-2026-89040","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"passport-saml-encrypted through 0.1.13 Authentication Bypass via Missing Signature Verification","id":"CVE-2026-89042"},"packages":[],"prev":{"headline":"Arbitrary file read via the convert_playwright_script prompt in mcp-k6","id":"CVE-2026-89039"},"products":["Mass Service Engine in Cluster (MSEC)"],"published":"2026-09-15","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-22","vendors":["Tencent"]},"summary":"Remote unauthenticated attackers can exploit path traversal to upload a webshell and execute arbitrary code with root privileges on Tencent MSEC devices.","url":"https://insights.sbomify.com/CVE-2026-89040/"}