Ruby-lang Webrick — known CVE vulnerabilities

Every CVE whose affected-product data names Ruby-lang Webrick, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.

CVEs (5)

• CVE-2009-4492 — CVSS 7.5 (high): WEBrick 1.3.1 in Ruby 1.8.6 through patchlevel 383, 1.8.7 through patchlevel 248, 1.8.8dev, 1.9.1 through patchlevel 376, and 1.9.2dev…
• CVE-2020-25613 — CVSS 7.5 (high): An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with…
• CVE-2025-6442 — CVSS 5.9 (medium): Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP…
• CVE-2019-11879 — CVSS 5.5 (medium): The WEBrick gem 1.4.2 for Ruby allows directory traversal if the attacker once had local access to create a symlink to a location outside…
• CVE-2008-1145 — CVSS 5.0 (medium): Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and 1.8.6-p114, and 1.9 through 1.9.0-1, when running on systems…