Vulnerability · Published Jul 10, 2026 · Assigned by GitHub_M
CVE-2026-55405LangChain4j: SQL injection via metadata filters in langchain4j-mariadb and langchain4j-pgvector
High 7.6
In plain English
A high-severity SQL injection in langchain4j from langchain4j. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | dev.langchain4j:langchain4j-mariadb | 1.2.1-beta8 | GHSA-2mfg-cc43-9pcj |
| Maven | dev.langchain4j:langchain4j-mariadb | 1.5.1-beta11 | GHSA-2mfg-cc43-9pcj |
| Maven | dev.langchain4j:langchain4j-mariadb | 1.11.8-beta19 | GHSA-2mfg-cc43-9pcj |
| Maven | dev.langchain4j:langchain4j-mariadb | 1.16.3-beta26 | GHSA-2mfg-cc43-9pcj |
| Maven | dev.langchain4j:langchain4j-pgvector | 1.2.1-beta8 | GHSA-2mfg-cc43-9pcj |
| Maven | dev.langchain4j:langchain4j-pgvector | 1.5.1-beta11 | GHSA-2mfg-cc43-9pcj |
| Maven | dev.langchain4j:langchain4j-pgvector | 1.11.8-beta19 | GHSA-2mfg-cc43-9pcj |
| Maven | dev.langchain4j:langchain4j-pgvector | 1.16.3-beta26 | GHSA-2mfg-cc43-9pcj |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| langchain4j | langchain4j | < 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 |
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
References
- https://github.com/langchain4j/langchain4j/security/advisories/GHSA-2mfg-cc43-9pcj x_refsource_CONFIRM
- https://github.com/langchain4j/langchain4j/commit/13a0698bdfaf105d8aaf0367881df51358596219 x_refsource_MISC
- https://github.com/langchain4j/langchain4j/commit/1bc1f60aa58ef5c3c1703caf73362482480351cf x_refsource_MISC
- https://github.com/langchain4j/langchain4j/commit/8805d5d128694302f1b0a2650174186862f669e7 x_refsource_MISC
- https://github.com/langchain4j/langchain4j/commit/ce96291dfb243c7f6753b5d65c7a77914642314f x_refsource_MISC
- https://github.com/langchain4j/langchain4j/commit/f14a10ce77e4ea1b8277f67d6a81f46abd7a5bc2 x_refsource_MISC
- https://github.com/langchain4j/langchain4j/releases/tag/1.16.3 x_refsource_MISC