Dotted namespace labels expose other namespaces in LangGraph stores
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
The langgraph-checkpoint-postgres package before 3.1.3 and langgraph-checkpoint-sqlite package before 3.1.2 flatten namespace labels by joining them with dots (CWE-20). Labels containing dots are not validated on get, search, delete and list operations, so they can resolve to another tenant's stored namespace. A remote attacker with low privileges can read, overwrite or delete data in another namespace.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| langchain-ai | langgraph | before 1.2.15 | 1.2.15 | Patch available | CNA |
| langchain-ai | langgraph-checkpoint-postgres | before 3.1.3 | 3.1.3 | Patch available | CNA |
| langchain-ai | langgraph-checkpoint-sqlite | before 3.1.2 | 3.1.2 | Patch available | CNA |
| — | langgraph-checkpoint-postgres (PyPI) | before 3.1.3 | 3.1.3 | Patch available | GHSA-6hmw-9432-67qq |
| — | langgraph-checkpoint-sqlite (PyPI) | before 3.1.2 | 3.1.2 | Patch available | GHSA-6hmw-9432-67qq |
- langgraph Vendorlangchain-ai Affected before 1.2.15 Fixed in 1.2.15 Patch available CNA
- langgraph-checkpoint-postgres Vendorlangchain-ai Affected before 3.1.3 Fixed in 3.1.3 Patch available CNA
- langgraph-checkpoint-sqlite Vendorlangchain-ai Affected before 3.1.2 Fixed in 3.1.2 Patch available CNA
- langgraph-checkpoint-postgres (PyPI) Vendor— Affected before 3.1.3 Fixed in 3.1.3 Patch available GHSA-6hmw-9432-67qq
- langgraph-checkpoint-sqlite (PyPI) Vendor— Affected before 3.1.2 Fixed in 3.1.2 Patch available GHSA-6hmw-9432-67qq
Remediation
Upgrade langgraph-checkpoint-postgres to 3.1.3 and langgraph-checkpoint-sqlite to 3.1.2. The sources list no fixed version for langgraph.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA langgraph (langchain-ai) Fixed in 1.2.15
- Fix · CNA langgraph-checkpoint-postgres (langchain-ai) Fixed in 3.1.3
- Fix · CNA langgraph-checkpoint-sqlite (langchain-ai) Fixed in 3.1.2
- Fix · GHSA-6hmw-9432-67qq langgraph-checkpoint-postgres (PyPI) Fixed in 3.1.3 Advisory →
- Fix · GHSA-6hmw-9432-67qq langgraph-checkpoint-sqlite (PyPI) Fixed in 3.1.2 Advisory →
Timeline
- 2026-10-23 Threatist record created from CVE-2026-115883
- 2026-10-23 Alias added: GHSA-6hmw-9432-67qq
- 2026-10-23 Fix available: PyPI/[email protected], PyPI/[email protected] · GHSA-6hmw-9432-67qq
- 2026-10-23 CVSS score added · GHSA-6hmw-9432-67qq
- 2026-10-23 Weakness changed · GHSA-6hmw-9432-67qq
- 2026-10-23 6 new references · GHSA-6hmw-9432-67qq
- 2026-10-24 Priority changed: MEDIUM → LOW
- 2026-10-26 CISA SSVC decision points changed
References
Other 6
- https://github.com/langchain-ai/langgraph/security/advisories/GHSA-6hmw-9432-67qq
- https://github.com/langchain-ai/langgraph/pull/9217
- https://github.com/langchain-ai/langgraph/commit/bfcfea554ed5c7f7be562cebf8825e911b493ab1
- https://github.com/langchain-ai/langgraph
- https://github.com/langchain-ai/langgraph/releases/tag/checkpointpostgres%3D%3D3.1.3
- https://github.com/langchain-ai/langgraph/releases/tag/checkpointsqlite%3D%3D3.1.2
More langchain-ai vulnerabilities
- TI-2024-31340 langchain_experimental (aka LangChain Experimental) 0.1.17 through 0.3.0 for LangChain… CVSS 3.1CRITICAL 9.8
- TI-2023-20724 An issue in langchain langchain-ai v.0.0.232 and before allows a remote attacker to… CVSS 3.1CRITICAL 9.8
- TI-2023-20706 An issue in LanChain-ai Langchain v.0.0.245 allows a remote attacker to execute arbitrary… CVSS 3.1CRITICAL 9.8
- TI-2023-20166 An issue in Harrison Chase langchain v.0.0.194 and before allows a remote attacker to… CVSS 3.1CRITICAL 9.8
- TI-2023-20136 An issue in LangChain v.0.0.231 allows a remote attacker to execute arbitrary code via the prompt parameter. CVSS 3.1CRITICAL 9.8
- TI-2023-18185 An issue in langchain v.0.0.171 allows a remote attacker to execute arbitrary code via a… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-115883 · CVE Program
- CVE-2026-115883 · NVD
- FIRST EPSS
- GHSA-6hmw-9432-67qq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences