langchain-ai langgraph-api up to 0.14.x Store authorization handlers improper authorization

Summaryinfo

A vulnerability was found in langchain-ai langgraph-api up to 0.14.x. It has been classified as critical. This issue affects some unknown processing of the component Store authorization handlers. Performing a manipulation results in improper authorization. This vulnerability was named CVE-2026-118668. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in langchain-ai langgraph-api up to 0.14.x. This affects an unknown code block of the component Store authorization handlers. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-118668 since 10/28/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 0.15.0 eliminates this vulnerability.

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Productinfo

Type

• Automation Software

Vendor

• langchain-ai

Name

• langgraph-api

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14

CPE 2.3info

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CPE 2.2info

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