CVE-2026-115883 LangGraph: Namespace labels containing `.` reach other namespaces in Postgres and SQLite stores
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-115883?
CVE-2026-115883 is a medium-severity vulnerability in langchain-ai langgraph, published on 23 Oct 2026.
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.
Which versions are affected by CVE-2026-115883?
4 open source packages ship an affected version, including langgraph-checkpoint-postgres and langgraph-checkpoint-sqlite.
| Package | Affected | Fixed in |
|---|---|---|
langgraph-checkpoint-postgres PyPI | All versions | 3.1.3 |
langgraph-checkpoint-postgres PyPI | All versions | 3.1.3 |
langgraph-checkpoint-sqlite PyPI | All versions | 3.1.2 |
langgraph-checkpoint-sqlite PyPI | All versions | 3.1.2 |
How do I fix CVE-2026-115883?
Upgrade langgraph-checkpoint-postgres to 3.1.3 or later.
Is CVE-2026-115883 being exploited?
There is no known exploitation of CVE-2026-115883 in the wild and no public exploit code.
Sources
Also known as GHSA-6hmw-9432-67qq.