# CVE-2026-27794: PYSEC-2026-2574 - LangGraph: BaseCache Deserialization of Untrusted Data may lead to Remote Code Execution

Source: https://junglewise.ai/threats/cve-2026-27794-langgraph-basecache-deserialization-of-untrusted-data-may-lead-to  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-13  
License: CC BY 4.0 with a link back

CVE-2026-27794 · Severity: low · CVSS 3.1 · Published 2026-07-13

LangGraph: BaseCache Deserialization of Untrusted Data may lead to Remote Code Execution

Technologies: [langgraph-checkpoint (PyPI)](https://junglewise.ai/threats/technologies/pypi-langgraph-checkpoint). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-27794 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-27794 being exploited in the wild.

**How severe is CVE-2026-27794?** Low severity, with a CVSS score of 3.1, published 13 July 2026.

**Which products and versions are affected?** langgraph-checkpoint (PyPI) ECOSYSTEM:introduced=0,fixed=4.0.0.

**Is there a fix for CVE-2026-27794?** Yes. langgraph-checkpoint (PyPI): upgrade to 4.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-27794?** Check whether you run langgraph-checkpoint (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- langgraph-checkpoint (PyPI): upgrade to 4.0.0 or later

  ```sh
  pip install "langgraph-checkpoint>=4.0.0"
  ```


## Affected products

- langgraph-checkpoint (PyPI) ECOSYSTEM:introduced=0,fixed=4.0.0

## Identifiers

- CVE-2026-27794
- GHSA-mhr3-j7m5-c7c9
- PYSEC-2026-2574

## Related threats

- [PYSEC-2026-1527 - LangGraph Checkpoint affected by RCE in "json" mode of JsonPlusSerializer](https://junglewise.ai/threats/cve-2025-64439-langgraph-checkpoint-affected-by-rce-in-json-mode-of)
- [LangChain LangGraph unsafe deserialization in JsonPlusSerializer](https://junglewise.ai/threats/cve-2026-48775-langchain-langgraph-unsafe-deserialization-in-jsonplusserializer)