| Component | LangChain |
| Severity | high (CVSS 7.6) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L |
| Published (NVD) | 2026-07-10 |
| Last modified | 2026-07-13 |
| Affected versions | < 1.2.1-beta8 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | 1.2.1-beta8 |
| Weakness | CWE-89 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade LangChain to
1.2.1-beta8or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-55405
- https://github.com/langchain4j/langchain4j/commit/13a0698bdfaf105d8aaf0367881df51358596219
- https://github.com/langchain4j/langchain4j/commit/1bc1f60aa58ef5c3c1703caf73362482480351cf
- https://github.com/langchain4j/langchain4j/commit/8805d5d128694302f1b0a2650174186862f669e7
- https://github.com/langchain4j/langchain4j/commit/ce96291dfb243c7f6753b5d65c7a77914642314f
- https://github.com/langchain4j/langchain4j/commit/f14a10ce77e4ea1b8277f67d6a81f46abd7a5bc2
- https://github.com/langchain4j/langchain4j/releases/tag/1.16.3
- https://github.com/langchain4j/langchain4j/security/advisories/GHSA-2mfg-cc43-9pcj
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