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CVE-2025-6442

Good to know:

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Date: June 25, 2025

Ruby WEBrick read_header HTTP Request Smuggling Vulnerability

Severity Score

Related Resources (8)

https://github.com/ruby/webrick/commit/ee60354bcb84ec33b9245e1d1aa6e1f7e8132101#diff-ad02984d873efb089aa51551bc6b7d307a53e0ba1ac439e91d69c2e58a478864
https://security-tracker.debian.org/tracker/CVE-2025-6442
https://nvd.nist.gov/vuln/detail/CVE-2025-6442
https://www.zerodayinitiative.com/advisories/ZDI-25-414/
https://github.com/ruby/webrick
https://www.zerodayinitiative.com/advisories/ZDI-25-414
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/webrick/CVE-2025-6442.yml
https://www.mend.io/vulnerability-database/CVE-2025-6442

Severity Score

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CWE-444

Top Fix

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Upgrade Version

Upgrade to version webrick - 1.8.2;https://github.com/ruby/webrick.git - v1.8.2

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

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