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.
Published: 2026-10-28
Score: 8.6 High
EPSS: n/a
KEV: No
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Remediation

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4hm6-w6qq-w73v LangGraph JavaScript custom authentication may permit cross-user Store access
History

Wed, 28 Oct 2026 21:15:00 +0000

Type Values Removed Values Added
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.
Title LangGraph JavaScript custom authentication may permit cross-user Store access
Weaknesses CWE-639
CWE-863
References
Metrics cvssV4_0

{'score': 8.6, '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'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-28T21:06:43.157Z

Reserved: 2026-10-28T17:25:37.562Z

Link: CVE-2026-118668

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-28T21:16:57.263

Modified: 2026-10-28T21:16:57.373

Link: CVE-2026-118668

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T22:30:12Z

Weaknesses