{"cve":"CVE-2026-118668","nvd":{"published":"2026-10-28T21:16:57.263","modified":"2026-10-28T21:16:57.373","status":"Deferred","description":"langgraph-api implements the LangGraph API for rapid development and testing. From 0.1.2 until 0.15.0, JavaScript or TypeScript custom authentication Store authorization handlers can return a rewritten namespace that is not carried across the runtime boundary and applied before the Store operation. An authenticated user can therefore access another user's Store namespace when a deployment relies on namespace rewriting for isolation, allowing unauthorized reads, overwrites, searches, or deletions. Python custom authentication and handlers that reject unauthorized namespaces instead of rewriting them are not affected. This issue is fixed in version 0.15.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.6},"cvss_v3":null,"cwes":["CWE-639","CWE-863"],"references":["https://github.com/langchain-ai/langgraph/security/advisories/GHSA-4hm6-w6qq-w73v"],"products":[],"source":"nvd","synced_at":"2026-10-28T21:45:43.571453220+00:00"},"epss":null,"kev":null,"osv":[{"id":"GHSA-4hm6-w6qq-w73v","url":"https://osv.dev/vulnerability/GHSA-4hm6-w6qq-w73v","summary":"LangGraph JavaScript custom authentication may permit cross-user Store access","modified":"2026-10-28T21:30:04.910677534Z","packages":[{"ecosystem":"PyPI","name":"langgraph-api","purl":"pkg:pypi/langgraph-api","ranges":[">=0.1.2 <0.15.0"],"fixed":["0.15.0"]}]}],"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."]}