# CVE-2026-115883: LangGraph: Namespace labels containing `.` reach other namespaces in Postgres and SQLite stores

> CVE-2026-115883: LangGraph: Namespace labels containing `.` reach other namespaces in Postgres and SQLite stores. CVSS 6.0 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-115883
Last updated: 2026-10-23T22:16:57Z

- Published: 2026-10-23 21:12 UTC · Updated: 2026-10-23 22:16 UTC · Assigner: GitHub\_M
- CVSS: 6.0 (CVSS 4.0) · Severity: Medium
- EPSS: 0.30%, 22th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-20, CWE-863

## 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 vendors and products

- langchain-ai: langgraph
- langchain-ai: langgraph-checkpoint-postgres
- langchain-ai: langgraph-checkpoint-sqlite

## Tracked companies

- [LangChain (LangSmith)](https://rewindex.com/company/langchain-langsmith.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-115883)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-115883)
- [https://github.com/langchain-ai/langgraph/commit/bfcfea554ed5c7f7be562cebf8825e911b493ab1](https://github.com/langchain-ai/langgraph/commit/bfcfea554ed5c7f7be562cebf8825e911b493ab1)
- [https://github.com/langchain-ai/langgraph/pull/9217](https://github.com/langchain-ai/langgraph/pull/9217)
- [https://github.com/langchain-ai/langgraph/security/advisories/GHSA-6hmw-9432-67qq](https://github.com/langchain-ai/langgraph/security/advisories/GHSA-6hmw-9432-67qq)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-115883 · Markdown: https://rewindex.com/cve/CVE-2026-115883.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-115883 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:13.310Z