LangGraph: Namespace prefix matching crosses segment boundaries in Postgres and SQLite stores

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-71433: 0.36% estimated exploitation activity in the next 30 days; percentile 30.20 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The Postgres and SQLite stores persist hierarchical namespaces as a dot-joined string (("memories", "alice") becomes memories.alice) and scoped reads by matching that string with LIKE '<path%'. Because LIKE has no notion of the . separator, a scoped search or listnamespaces also matched sibling namespaces whose flattened form shares leading characters. Applications commonly use the namespace as a tenant boundary. Where they do, a read scoped to one namespace could return items belonging to another, without any crafted input — an ordinary scoped request was sufficient. We have no evidence of this behavior being exploited in the wild. Affected users / systems You may be affected if you: - use PostgresStore/AsyncPostgresStore or SqliteStore/AsyncSqliteStore, and - rely on the namespace to separate data between users or tenants, and - have namespace labels where one is a prefix of another (1 and 12, alice and alice2), or labels containing or % Applications whose namespace labels…

Published by the source

6 Aug 2026, 19:03 UTC

Last modified by the source

11 Aug 2026, 04:13 UTC

Source last checked

26 Oct 2026, 13:50 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-47pj-3jcm-6whg

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-71433

Advisory: LangGraph: Namespace prefix matching crosses segment boundaries in Postgres and SQLite stores
IDs: CVE-2026-71433, GHSA-47pj-3jcm-6whg
Record: https://patchnext.com/advisories/cve-2026-71433 (revision 1, source checked 26 Oct 2026, 13:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: langgraph-checkpoint-postgres 3.1.1; langgraph-checkpoint-sqlite 3.1.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI langgraph-checkpoint-postgres: affected < 3.1.1; fixed in 3.1.1
- PyPI langgraph-checkpoint-sqlite: affected < 3.1.1; fixed in 3.1.1

## Suggested inspection (read-only)
- `python -m pip show langgraph-checkpoint-postgres`: prints the installed version. Run with the environment that serves production active.
- `python -m pip show langgraph-checkpoint-sqlite`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on langgraph-checkpoint-postgres, langgraph-checkpoint-sqlite.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-47pj-3jcm-6whg (GitHub-reviewed advisory GHSA-47pj-3jcm-6whg lists affected ranges: PyPI langgraph-checkpoint-postgres >=0 =0 <3.1.1)

Commands are suggestions: review each one before running it.