# CVE-2026-27022 — langchain-ai langgraphjs

> As of 2026-02-24, CVE-2026-27022 is a MEDIUM-severity vulnerability in langchain-ai langgraphjs, CVSS v3.1 6.5, EPSS 0.5% (41.2th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-27022, most recently “LangGraph Checkpointer: Chained SQLi-to-RCE via Unsafe msgpack Deserialization (CVE-2025-67644, CVE-2026-28277, CVE-2026-27022)”.

**Last updated:** 2026-02-24

## What is CVE-2026-27022?

@langchain/langgraph-checkpoint-redis is the Redis checkpoint and store implementation for LangGraph. A query injection vulnerability exists in the @langchain/langgraph-checkpoint-redis package's filter handling. The RedisSaver and ShallowRedisSaver classes construct RediSearch queries by directly interpolating user-provided filter keys and values without proper escaping. RediSearch has special syntax characters that can modify query behavior, and when user-controlled data contains these characters, the query logic can be manipulated to bypass intended access controls. This vulnerability is fixed in 1.0.2.

The record classifies CVE-2026-27022 under weakness class [CWE-74](https://intel.threadlinqs.com/cwe/CWE-74). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 249 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **EPSS (FIRST):** 0.5% probability of exploitation in the next 30 days, higher than 41.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-02-20, last modified 2026-02-24

## Is CVE-2026-27022 being exploited?

It currently carries a trending score of 15 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **langchain-ai**: langgraphjs

## How to fix CVE-2026-27022

No vendor patch reference has been recorded for CVE-2026-27022 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-27022

1 tracked threat in the Threadlinqs corpus references CVE-2026-27022, either in the campaign’s CVE list or as an indicator on the campaign record.

- [LangGraph Checkpointer: Chained SQLi-to-RCE via Unsafe msgpack Deserialization (CVE-2025-67644, CVE-2026-28277, CVE-2026-27022)](https://intel.threadlinqs.com/threat/TL-2026-0778) — CRITICAL · 2026-06-11

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/langchain-ai/langgraphjs/security/advisories/GHSA-5mx2-w598-339m)

**Other references**

- [github.com](https://github.com/langchain-ai/langgraphjs/pull/1943)
- [github.com (814c76dc3938d0f6f7e17ca3bc11d6a12270b2a1)](https://github.com/langchain-ai/langgraphjs/commit/814c76dc3938d0f6f7e17ca3bc11d6a12270b2a1)
- [github.com (langgraph checkpoint redis@1.0)](https://github.com/langchain-ai/langgraphjs/releases/tag/@langchain/langgraph-checkpoint-redis@1.0.2)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-27022
Full detection coverage and IOCs for threats exploiting CVE-2026-27022 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp