🛡️ AZL-64355 — rubygem-webrick (CVE-2025-6442)
Description
CVE-2025-6442 affecting package rubygem-webrick for versions less than 1.8.1-2
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.
Affected software
AZL-64355 is recorded against 1 package.
- rubygem-webrick (fixed in 1.8.1-2)
Timeline and source
Published on 25 June 2025 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
Details
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| rubygem-webrick | — | 1.8.1-2 |
References
Similar Threats
- Unknown AZL-64367
- Unknown RHSA-2024:8906
- High OESA-2024-2226
- Unknown RHSA-2023:2097
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