{"cve":"CVE-2026-104873","nvd":{"published":"2026-10-02T20:17:01.223","modified":"2026-10-06T15:08:38.397","status":"Awaiting Analysis","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.","cvss_v4":{"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","score":7.6},"cvss_v3":null,"cwes":["CWE-863"],"references":["https://github.com/langchain-ai/langgraph/commit/5a77be5e8bec1600ad0a865638d88c1368497559","https://github.com/langchain-ai/langgraph/releases/tag/sdk==0.4.4","https://github.com/langchain-ai/langgraph/security/advisories/GHSA-fvww-7h3r-vfhp"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-104873","score":0.00253,"percentile":0.16603,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-fvww-7h3r-vfhp","url":"https://osv.dev/vulnerability/GHSA-fvww-7h3r-vfhp","summary":"LangGraph SDK custom auth silently ignores actions= on resource decorators","modified":"2026-10-15T14:55:53.373586904Z","packages":[{"ecosystem":"PyPI","name":"langgraph-sdk","purl":"pkg:pypi/langgraph-sdk","ranges":[">=0.1.45 <0.4.4"],"fixed":["0.4.4"]}]},{"id":"PYSEC-2026-4240","url":"https://osv.dev/vulnerability/PYSEC-2026-4240","summary":"LangGraph SDK custom auth silently ignores actions= on resource decorators","modified":"2026-10-15T14:45:12.944430612Z","packages":[{"ecosystem":"PyPI","name":"langgraph-sdk","purl":"pkg:pypi/langgraph-sdk","ranges":[">=0.1.45 <0.4.4"],"fixed":["0.4.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}