HIGH 7.7 Microsoft
CVE-2025-6442
Ruby WEBrick read_header HTTP Request Smuggling Vulnerability
Microsoft Security Update 2025-Jun: Ruby WEBrick read_header HTTP Request Smuggling Vulnerability
Affected Products
- azl3 rubygem-webrick 1.8.1-2 on Azure Linux 3.0
- cbl2 ruby 3.1.7-1 on CBL Mariner 2.0
- cbl2 rubygem-webrick 1.7.0-2 on CBL Mariner 2.0
- CBL Mariner 2.0 x64
- CBL Mariner 2.0 ARM
- Azure Linux 3.0 x64
- Azure Linux 3.0 ARM
- azl3 ruby 3.3.5-4 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-6442
- https://nvd.nist.gov/vuln/detail/CVE-2025-6442
This high severity vulnerability with a CVSS score of 7.7 was published on 2025-06-10 via Microsoft. Affected: azl3 rubygem-webrick 1.8.1-2 on Azure Linux 3.0, cbl2 ruby 3.1.7-1 on CBL Mariner 2.0, cbl2 rubygem-webrick 1.7.0-2 on CBL Mariner 2.0 and 5 more.
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