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CVE-2026-71433— LangGraph: Namespace prefix matching crosses segment boundaries in Postgres and SQLite stores

Quick assessment

Affected
langchain-ai langgraph
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LangChain LangGraph是LangChain公司开源的一个大模型框架。 LangChain LangGraph 3.1.1之前版本存在安全漏洞，该漏洞源于命名空间以点连接字符串持久化并以简单前缀模式匹配作用域读取，可能导致经过身份验证的调用者检索到属于其他租户或用户的项目。

CVSS 5.3 · Medium EPSS 0.36% · P28

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 3

VendorProduct Version RangeStatus
langchain-ai langgraph < 3.1.1 affected
langchain-ai langgraph-checkpoint-postgres < 3.1.1 affected
langchain-ai langgraph-checkpoint-sqlite < 3.1.1 affected
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I. Basic Information for CVE-2026-71433

Vulnerability Information
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Vulnerability Title
LangGraph: Namespace prefix matching crosses segment boundaries in Postgres and SQLite stores
Source: CVE Program / CVE List V5
Vulnerability Description
LangGraph Checkpoint Postgres and SQLite Checkpoint are the Postgres and SQLite implementations of LangGraph's checkpoint saver. Prior to 3.1.1, the langgraph-checkpoint-postgres and langgraph-checkpoint-sqlite packages persisted hierarchical namespaces as a dot joined string and scoped reads by matching that string as a simple prefix pattern, so a read scoped to one namespace could also match a sibling namespace whose flattened form shares the same leading characters, or a namespace label containing unescaped pattern metacharacters, allowing an authenticated caller to retrieve stored items belonging to another tenant or user through an ordinary scoped search or list namespaces call, with no crafted input required. This issue is fixed in versions 3.1.1 of langgraph-checkpoint-postgres and langgraph-checkpoint-sqlite.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
LangChain LangGraph 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LangChain LangGraph是LangChain公司开源的一个大模型框架。 LangChain LangGraph 3.1.1之前版本存在安全漏洞，该漏洞源于命名空间以点连接字符串持久化并以简单前缀模式匹配作用域读取，可能导致经过身份验证的调用者检索到属于其他租户或用户的项目。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
langchain-ai langgraph < 3.1.1 -
langchain-ai langgraph-checkpoint-sqlite < 3.1.1 -
langchain-ai langgraph-checkpoint-postgres < 3.1.1 -

II. Public POCs for CVE-2026-71433

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III. Intelligence Information for CVE-2026-71433

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Patches & Fixes for CVE-2026-71433 (2)

Vendor Advisories for CVE-2026-71433 (1)

Vendor Pages for CVE-2026-71433 (1)

IV. Related Vulnerabilities

Same product: langgraph
Same vendor: langchain-ai
Same weakness: CWE-200

V. Comments for CVE-2026-71433

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