CVE-2026-55405 PUBLISHED

LangChain4j: SQL injection via metadata filters in langchain4j-mariadb and langchain4j-pgvector

Assigner: GitHub_M
Reserved: 16.06.2026 Published: 10.07.2026 Updated: 10.07.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
CVSS Score: 7.6

Product Status

Vendor langchain4j
Product langchain4j
Versions
  • Version < 1.2.1-beta8 is affected
  • Version >= 1.3.0-beta9, < 1.5.1-beta11 is affected
  • Version >= 1.6.0-beta12, < 1.11.8-beta19 is affected
  • Version >= 1.12.1-beta21, < 1.16.3-beta26 is affected

References

Problem Types

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