CVE-2025-6442
Last modified
CVE-2025-6442 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
Description
Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable when the product is deployed behind an HTTP proxy that fulfills specific conditions. The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP requests. Was ZDI-CAN-21876.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Webrick | < 1.8.2 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-6442?
How severe is CVE-2025-6442?
How do I fix CVE-2025-6442?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-64405Apache OpenOffice documents can contain links. A missing Aut…7.5
- CVE-2025-64406An out-of-bounds Write vulnerability in Apache OpenOffice co…4.3
- CVE-2025-64407Apache OpenOffice documents can contain links. A missing Aut…5.3
- CVE-2025-64408Apache Causeway faces Java deserialization vulnerabilities t…6.3
- CVE-2025-6441The Webinar Solution: Create live/evergreen/automated/instan…9.8
- CVE-2025-64419Coolify is an open-source and self-hostable tool for managin…8.8
- CVE-2025-64420Coolify is an open-source and self-hostable tool for managin…8.8
- CVE-2025-64421Coolify is an open-source and self-hostable tool for managin…8
- CVE-2025-64422Coolify is an open-source and self-hostable tool for managin…4.3
- CVE-2025-64423Coolify is an open-source and self-hostable tool for managin…8.8
- CVE-2025-64424Coolify is an open-source and self-hostable tool for managin…8.8
- CVE-2025-64425Coolify is an open-source and self-hostable tool for managin…8.1
Are you affected by CVE-2025-6442?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST