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CVE-2026-115883— LangGraph: Namespace labels containing `.` reach other namespaces 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.

LangGraph 检查点保存器（checkpoint savers）为 LangGraph 工作流和代理提供基于 PostgreSQL 和 SQLite 的状态持久化功能。在 langgraph-checkpoint-postgres 3.1.3 和 langgraph-checkpoint-sqlite 3.1.2 之前，PostgresStore、AsyncPostgresStore、SqliteStore 和 AsyncSqliteStore 在保存命名空间标签时，会使用 ".".join(namespac

CVSS 6.0 · Medium
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I. Basic Information for CVE-2026-115883

Vulnerability Information
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Vulnerability Title
LangGraph: Namespace labels containing `.` reach other namespaces in Postgres and SQLite stores
Source: CVE Program / CVE List V5
Vulnerability Description
LangGraph checkpoint savers provide Postgres- and SQLite-backed state persistence for LangGraph workflows and agents. Prior to langgraph-checkpoint-postgres 3.1.3 and langgraph-checkpoint-sqlite 3.1.2, PostgresStore, AsyncPostgresStore, SqliteStore, and AsyncSqliteStore flatten namespace labels with ".".join(namespace), while BaseStore validates labels only for put and aput. Unvalidated dotted labels passed through get, search, delete, list_namespaces, their asynchronous equivalents, or direct batch and abatch operations can resolve to another tenant's stored namespace, allowing cross-namespace reads, overwrites, or deletion. InMemoryStore is not affected because it compares namespace tuples. This issue is fixed in langgraph-checkpoint-postgres 3.1.3 and langgraph-checkpoint-sqlite 3.1.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
langchain-ai langgraph < 1.2.15 -
langchain-ai langgraph-checkpoint-postgres < 3.1.3 -
langchain-ai langgraph-checkpoint-sqlite < 3.1.2 -

II. Public POCs for CVE-2026-115883

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III. Intelligence Information for CVE-2026-115883

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Patches & Fixes for CVE-2026-115883 (1)

Vendor Advisories for CVE-2026-115883 (1)

IV. Related Vulnerabilities

Same product: langgraph
Same vendor: langchain-ai
Same weakness: CWE-20

V. Comments for CVE-2026-115883

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