{"answers":{"affected":"3 open source packages ship an affected version, including langgraph-sdk.","exploited":"There is no known exploitation of CVE-2026-104873 in the wild and no public exploit code.","fix":"Upgrade langgraph-sdk to 0.4.4 or later.","what":"CVE-2026-104873 is a high-severity missing authorization vulnerability in langchain-ai langgraph, published on 2 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-104873 and fix it if it is affected.\n\nWhat it is: CVE-2026-104873 is a high-severity missing authorization vulnerability in langchain-ai langgraph, published on 2 Oct 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-2026-104873 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- langgraph-sdk (PyPI): affected from 0.1.45; fixed in 0.4.4\n- langgraph-sdk (PyPI): affected from 0.1.45; fixed in 0.4.4\n- langgraph-sdk (PyPI): affected from 0.1.45; fixed in 0.4.4\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-2026-104873/ (Markdown: https://insights.sbomify.com/CVE-2026-104873/index.md)","id":"CVE-2026-104873","markdown":"https://insights.sbomify.com/CVE-2026-104873/index.md","name":"CVE-2026-104873","record":{"aliases":["ECHO-af4a-f4a1-bc1c","GHSA-fvww-7h3r-vfhp","PYSEC-2026-4240","ROOT-APP-PYPI-CVE-2026-104873","openSUSE-SU-2026:12279-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"LangGraph Python SDK","requires_auth":"low_privilege","summary":"Authenticated users can bypass action-specific authorization checks in LangGraph SDK decorators, allowing unauthorized access to other users' resources.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.6,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python applications. From 0.1.45 until 0.4.4, the langgraph-sdk resource-scoped authorization decorators @auth.on.threads, @auth.on.assistants, and @auth.on.crons ignore the actions argument and register the selected handler for every action on the resource. Because that wildcard resource handler is selected before broader fallback handlers, an authenticated user may bypass fallback action, ownership, or permission checks and read, update, or delete another user's resource. Only Python deployments using actions on the affected decorators are vulnerable, and a deployment remains protected when the selected handler independently enforces all required checks for every action it receives. This issue is fixed in version 0.4.4.","ecosystems":["PyPI","openSUSE:Tumbleweed"],"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":"LangGraph SDK custom auth silently ignores actions= on resource decorators","id":"CVE-2026-104873","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Multidict: Reference leak in CIMultiDict/MultiDict items-view union and subtraction","id":"CVE-2026-104874"},"packages":[{"ecosystem":"PyPI","fixed":["0.4.4"],"introduced":["0.1.45"],"last_affected":[],"package":"langgraph-sdk","purl":null,"source":"GHSA-fvww-7h3r-vfhp"},{"ecosystem":"PyPI","fixed":["0.4.4"],"introduced":["0.1.45"],"last_affected":[],"package":"langgraph-sdk","purl":"pkg:pypi/langgraph-sdk","source":"GHSA-fvww-7h3r-vfhp"},{"ecosystem":"PyPI","fixed":["0.4.4"],"introduced":["0.1.45"],"last_affected":[],"package":"langgraph-sdk","purl":"pkg:pypi/langgraph-sdk","source":"PYSEC-2026-4240"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.4.9-1.1"],"introduced":["0"],"last_affected":[],"package":"python-langgraph-sdk","purl":"pkg:rpm/opensuse/python-langgraph-sdk\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:12279-1"}],"prev":{"headline":"Multiple @opentelemetry/instrumentation-* packages expose database username via unconditional db.user span attribute","id":"CVE-2026-104872"},"products":["langgraph"],"published":"2026-10-02","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":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"2026-10-05","vendors":["langchain-ai"]},"summary":"Authenticated users can bypass action-specific authorization checks in LangGraph SDK decorators, allowing unauthorized access to other users' resources.","url":"https://insights.sbomify.com/CVE-2026-104873/"}