LangChain MongoDB has NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure
High-risk advisory
CVE-2026-55253
Summary
LangChain MongoDB has NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure
Why it matters
GitHub has published a reviewed security advisory for langgraph-checkpoint-mongodb. Prioritize it with other application dependency updates.
Operator check
Check whether langgraph-checkpoint-mongodb is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.