{"answers":{"affected":"3 open source packages ship an affected version, including langchain-chatchat.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7846 exists.","fix":"No fix has been published for CVE-2026-7846 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-7846 is a low-severity vulnerability in chatchat-space Langchain-Chatchat, published on 5 May 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-7846 and fix it if it is affected.\n\nWhat it is: CVE-2026-7846 is a low-severity vulnerability in chatchat-space Langchain-Chatchat, published on 5 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7846 exists.\n\nAffected packages and fixed versions:\n- langchain-chatchat (PyPI): affected all versions up to 0.3.1.3; no fix listed\n- langchain-chatchat (PyPI): affected all versions up to 0.3.1.3; no fix listed\n- langchain-chatchat (PyPI): affected all versions up to 0.3.1.3; no fix listed\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-2026-7846/ (Markdown: https://insights.sbomify.com/CVE-2026-7846/index.md)","id":"CVE-2026-7846","markdown":"https://insights.sbomify.com/CVE-2026-7846/index.md","name":"CVE-2026-7846","record":{"aliases":["GHSA-x229-w2j4-h748","PYSEC-2026-2559"],"analysis":{"component_type":"web_application","fix_type":"no_fix_stated","impacts":["other"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Langchain-Chatchat","requires_auth":"low_privilege","summary":"Attackers can exploit a race condition in the file upload API to bypass security checks, requiring local network access and high complexity.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":2.1,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"A vulnerability has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. Impacted is the function files of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component OpenAI-Compatible File Upload API. Such manipulation of the argument file.filename leads to time-of-check time-of-use. Access to the local network is required for this attack to succeed. The attack requires a high level of complexity. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"chatchat-space Langchain-Chatchat OpenAI-Compatible File Upload API openai_routes.py files toctou","id":"CVE-2026-7846","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":3,"n_references":6,"next":{"headline":"chatchat-space Langchain-Chatchat Uploaded File openai_routes.py _get_file_id random values","id":"CVE-2026-7847"},"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["0.3.1.3"],"package":"langchain-chatchat","purl":null,"source":"GHSA-x229-w2j4-h748"},{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["0.3.1.3"],"package":"langchain-chatchat","purl":"pkg:pypi/langchain-chatchat","source":"GHSA-x229-w2j4-h748"},{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["0.3.1.3"],"package":"langchain-chatchat","purl":"pkg:pypi/langchain-chatchat","source":"PYSEC-2026-2559"}],"prev":{"headline":"chatchat-space Langchain-Chatchat Vision Chat Paste Image dialogue.py PIL.Image.tobytes weak hash","id":"CVE-2026-7845"},"products":["Langchain-Chatchat"],"published":"2026-05-05","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-05","vendors":["chatchat-space"]},"summary":"Attackers can exploit a race condition in the file upload API to bypass security checks, requiring local network access and high complexity.","url":"https://insights.sbomify.com/CVE-2026-7846/"}