Vulnerability · Published Aug 6, 2026 · Assigned by GitHub_M
CVE-2026-71433LangGraph: Namespace prefix matching crosses segment boundaries in Postgres and SQLite stores
Medium 5.3
In plain English
A medium-severity information exposure 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 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | langgraph-checkpoint-postgres | 3.1.1 | GHSA-47pj-3jcm-6whg |
| PyPI | langgraph-checkpoint-postgres | 3.1.1 | PYSEC-2026-3635 |
| PyPI | langgraph-checkpoint-sqlite | 3.1.1 | GHSA-47pj-3jcm-6whg |
| PyPI | langgraph-checkpoint-sqlite | 3.1.1 | PYSEC-2026-3636 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| langchain-ai | langgraph | < 3.1.1 |
| langchain-ai | langgraph-checkpoint-sqlite | < 3.1.1 |
| langchain-ai | langgraph-checkpoint-postgres | < 3.1.1 |
Weakness: CWE-200, CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/langchain-ai/langgraph/security/advisories/GHSA-47pj-3jcm-6whg x_refsource_CONFIRM
- https://github.com/langchain-ai/langgraph/pull/8478 x_refsource_MISC
- https://github.com/langchain-ai/langgraph/commit/66ebe1a0da921e73f0f9f879ba105d314c079f7c x_refsource_MISC
- https://github.com/langchain-ai/langgraph/releases/tag/checkpointpostgres%3D%3D3.1.1 x_refsource_MISC
- https://github.com/langchain-ai/langgraph/releases/tag/checkpointsqlite%3D%3D3.1.1 x_refsource_MISC