Vulnerability in Langchain-Ai Langgraphjs

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.040 (90.6th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-27022: rose from 0.005 to 0.040.

EPSS over last 30 days · oldest: 0.005 · newest: 0.040 · change: +0.035

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-27022?
CVE-2026-27022 is a medium-severity vulnerability in Langchain-Ai Langgraphjs, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2026-02-20.
How severe is CVE-2026-27022?
Medium severity. CVSS v3 base score is 6.5 out of 10.