SQL Injection in dev.langchain4j:langchain4j-mariadb (CVE-2026-55405)
Summary
SQL injection in dev.langchain4j:langchain4j-mariadb (CVE-2026-55405). Confidential information can be exposed externally. Exploitable via COMBINED_JSON. Mitigation: upgrade to 1.16.3-beta26 or later.
Original description
The description as published by the source.
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.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-55405 has been found in dev.langchain4j:langchain4j-mariadb.
Attackers can target a specific entry point like COMBINED_JSON over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.6/10.
What to do: upgrade dev.langchain4j:langchain4j-mariadb to 1.16.3-beta26 or later.
If unsure, ask your IT team or search "dev.langchain4j:langchain4j-mariadb CVE-2026-55405" on the vendor's site.
CVE-2026-55405 (dev.langchain4j:langchain4j-mariadb) — CWE-89 / CVSS v3 7.6
Attack vector: remote (network-reachable) / no user interaction
Attack surface: COMBINED_JSON / COMBINED_JSONB / JSONFilterMapper / COLUMN_PER_KEY
Patched: 1.16.3-beta26 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
SQL injection (CWE-89) exists in dev.langchain4j:langchain4j-mariadb. Attackers reach the vulnerable code path via COMBINED_JSON.
Check the vendor advisory for the affected versions of dev.langchain4j:langchain4j-mariadb. Attack surface: COMBINED_JSON / COMBINED_JSONB / JSONFilterMapper / COLUMN_PER_KEY.
Severity: High (CVSS 7.6/10). Confidential information can be exposed externally.
Update to 1.16.3-beta26.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで dev.langchain4j:langchain4j-mariadb を使っているサービスとバージョンを洗い出す。
-
2Apply patch patch
Upgrade dev.langchain4j:langchain4j-mariadb to 1.16.3-beta26ステージング環境で 1.16.3-beta26 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com
- patch github.com
- patch github.com
- patch github.com
- patch github.com
- web github.com
- web github.com