Answer in brief
CVE-2026-55405 records a High severity (CVSS 7.6) vulnerability in LangChain4j: SQL injection via metadata filters in langchain4j-mariadb and langchain4j-pgvector. The current sources do not mark it as known exploited. The current feed maps langchain4j/langchain4j (generic), dev.langchain4j:langchain4j-mariadb (maven), dev.langchain4j:langchain4j-mariadb (maven), dev.langchain4j:langchain4j-mariadb (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps langchain4j/langchain4j (generic), dev.langchain4j:langchain4j-mariadb (maven), dev.langchain4j:langchain4j-mariadb (maven), dev.langchain4j:langchain4j-mariadb (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| langchain4j/langchain4jgeneric | < 1.2.1-beta8 || >= 1.3.0-beta9, < 1.5.1-beta11 || >= 1.6.0-beta12, < 1.11.8-beta19 || >= 1.12.1-beta21, < 1.16.3-beta26 | Not reported |
| dev.langchain4j:langchain4j-mariadbmaven | <=1.2.0-beta8 | 1.2.1-beta8 |
| dev.langchain4j:langchain4j-mariadbmaven | >=1.3.0-beta9,<=1.5.0-beta11 | 1.5.1-beta11 |
| dev.langchain4j:langchain4j-mariadbmaven | >=1.6.0-beta12,<=1.11.7-beta19 | 1.11.8-beta19 |
| dev.langchain4j:langchain4j-mariadbmaven | >=1.12.1-beta21,<=1.16.2-beta26 | 1.16.3-beta26 |
| dev.langchain4j:langchain4j-pgvectormaven | <=1.2.0-beta8 | 1.2.1-beta8 |
| dev.langchain4j:langchain4j-pgvectormaven | >=1.3.0-beta9,<=1.5.0-beta11 | 1.5.1-beta11 |
| dev.langchain4j:langchain4j-pgvectormaven | >=1.6.0-beta12,<=1.11.7-beta19 | 1.11.8-beta19 |
| dev.langchain4j:langchain4j-pgvectormaven | >=1.12.1-beta21,<=1.16.2-beta26 | 1.16.3-beta26 |
Published upstream
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 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.
Quoted source text, attributed separately from HOL analysis.