Vulnerability in Langchain-ai Langgraphjs

CVE-2026-48121

@langchain/langgraph-checkpoint-mongodb provides a LangGraph.js CheckpointSaver implementation that uses MongoDB for storage. Versions 1.3.0 and below are vulnerable to NoSQL injection: checkpoint identifiers (thread_id, checkpoint_ns, che…

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-48121?
CVE-2026-48121 is a medium-severity vulnerability in Langchain-ai Langgraphjs, classified under Improper Neutralization of Special Elements in Data Query Logic. CVSS score: 6.7/10. Published 2026-08-04.
How severe is CVE-2026-48121?
Medium severity. CVSS v3 base score is 6.7 out of 10.