CVE-2026-55405

Summary

LangChain4j is a Java library for building LLM-powered applications on the JVM. Prior to 1.2.1-beta8, 1.5.1-beta11, 1.11.8-beta19, and 1.16.3-beta26, the MariaDB and pgvector embedding stores build metadata-filter SQL by string-concatenating filter keys, and in MariaDB string values, directly into the query without adequate escaping. A crafted metadata key in EmbeddingSearchRequest.filter() can break out of its SQL context and inject arbitrary SQL into the statements executed by the stores' search and removeAll(Filter) operations, enabling blind data exfiltration, denial of service via sleep functions, and deletion of arbitrary rows through removeAll(Filter). This issue is fixed in langchain4j-mariadb and langchain4j-pgvector versions 1.2.1-beta8, 1.5.1-beta11, 1.11.8-beta19, and 1.16.3-beta26.

Affected Software

VendorProductVersion RangeStatus
langchain4jlangchain4j< 1.2.1-beta8affected
langchain4jlangchain4j>= 1.3.0-beta9, < 1.5.1-beta11affected
langchain4jlangchain4j>= 1.6.0-beta12, < 1.11.8-beta19affected
langchain4jlangchain4j>= 1.12.1-beta21, < 1.16.3-beta26affected

Weaknesses

  • CWE-89: CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

References