VDB
DEBIAN-CVE-2025-6442
DEBIAN-CVE-2025-6442
PUBLISHED
CVSS 5.900000095367432 MEDIUM
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.
Risk Scores
CVSS 3.1
5.900000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | ruby-webrick | 0, 0 |
| Debian:12 | ruby-webrick | 1.8.1-1, 1.9.2-1, 1.9.1-1 |
| Debian:14 | ruby-webrick | 0, 0 |
Exploit Intelligence
- CVE-2025-6442.yml (github-poc)
- .bundler-audit.yml (github-poc)
- macos_v2_generated.go (github-poc)
- macos_v1_generated.go (github-poc)
Timeline
- Jun 25, 2025 CVE Published
- Apr 28, 2026 CVE Updated