Vulnerability · Published Oct 23, 2026 · Assigned by GitHub_M
CVE-2026-115883LangGraph: Namespace labels containing `.` reach other namespaces in Postgres and SQLite stores
Medium 6.0
In plain English
A medium-severity improper input validation in langgraph from langchain-ai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | langgraph-checkpoint-postgres | 3.1.3 | GHSA-6hmw-9432-67qq |
| PyPI | langgraph-checkpoint-sqlite | 3.1.2 | GHSA-6hmw-9432-67qq |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| langchain-ai | langgraph | < 1.2.15 |
| langchain-ai | langgraph-checkpoint-postgres | < 3.1.3 |
| langchain-ai | langgraph-checkpoint-sqlite | < 3.1.2 |
Weakness: CWE-20, CWE-863 · Vector: 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