{"id":"CVE-2026-115883","published":"2026-10-23T22:16:57.820","lastModified":"2026-10-26T18:34:17.050","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-20","CWE-863"],"vendors":[],"products":[],"references":[{"url":"https://github.com/langchain-ai/langgraph/commit/bfcfea554ed5c7f7be562cebf8825e911b493ab1","tags":[]},{"url":"https://github.com/langchain-ai/langgraph/pull/9217","tags":[]},{"url":"https://github.com/langchain-ai/langgraph/security/advisories/GHSA-6hmw-9432-67qq","tags":[]}],"exploitRefs":[{"url":"https://github.com/langchain-ai/langgraph/commit/bfcfea554ed5c7f7be562cebf8825e911b493ab1","tags":[]},{"url":"https://github.com/langchain-ai/langgraph/pull/9217","tags":[]},{"url":"https://github.com/langchain-ai/langgraph/security/advisories/GHSA-6hmw-9432-67qq","tags":[]}],"hasPoc":true,"ai":null}