# CVE-2025-6442: Ruby WEBrick read_headers method can lead to HTTP Request/Response Smuggling

Source: https://junglewise.ai/threats/cve-2025-6442-ruby-webrick-read-headers-method-can-lead-to-http-request-response  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-06-26  
License: CC BY 4.0 with a link back

CVE-2025-6442 · Severity: low · CVSS 3 · Published 2025-06-26

Ruby WEBrick read_headers method can lead to HTTP Request/Response Smuggling

Technologies: [webrick (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-webrick). Vendors: [RubyGems](https://junglewise.ai/threats/vendors/rubygems).

## Quick answers

**Is CVE-2025-6442 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-6442 being exploited in the wild.

**How severe is CVE-2025-6442?** Low severity, with a CVSS score of 3, published 26 June 2025.

**Which products and versions are affected?** webrick (RubyGems) ECOSYSTEM:introduced=0,fixed=1.8.2.

**Is there a fix for CVE-2025-6442?** Yes. webrick (RubyGems): upgrade to 1.8.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-6442?** Check whether you run webrick (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- webrick (RubyGems): upgrade to 1.8.2 or later

  ```sh
  bundle update webrick
  ```


## Affected products

- webrick (RubyGems) ECOSYSTEM:introduced=0,fixed=1.8.2

## Identifiers

- CVE-2025-6442
- GHSA-r995-q44h-hr64

## Related threats

- [HTTP Request Smuggling in ruby webrick](https://junglewise.ai/threats/cve-2024-47220-http-request-smuggling-in-ruby-webrick)
- [WEBRick vulnerable to HTTP Request/Response Smuggling](https://junglewise.ai/threats/cve-2020-25613-webrick-vulnerable-to-http-request-response-smuggling)
- [WEBrick RCE Vulnerability](https://junglewise.ai/threats/cve-2017-10784-webrick-rce-vulnerability)
- [WEBrick Denial of Service Vulnerability](https://junglewise.ai/threats/cve-2008-4310-webrick-denial-of-service-vulnerability)
- [WEBrick Improper Input Validation vulnerability](https://junglewise.ai/threats/cve-2009-4492-webrick-improper-input-validation-vulnerability)