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ruby-lang webrick vulnerabilities

4 published CVES affecting ruby-lang webrick, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).

Total
4
Critical
0
High
2
Medium
2
Low
0
Unscored
0
CISA KEV
0

Latest ruby-lang webrick CVEs

Newest publication first

  1. CVE-2025-6442 Ruby WEBrick read_header HTTP Request Smuggling Vulnerability

    Published
    MediumCVSS 5.9 PoC

    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 specif...

  2. CVE-2020-25613 WEBRick vulnerable to HTTP Request/Response Smuggling

    Published
    HighCVSS 7.5 PoC

    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 Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (w...

  3. CVE-2009-4492 WEBrick Improper Input Validation vulnerability

    Published
    HighCVSS 7.5 EPSS 16.2% Public exploit PoC

    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 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly...

  4. CVE-2008-1145 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 that support backslash () path separators or case-insensitiv...

    Published
    MediumCVSS 5.0 EPSS 27.1%

    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 that support backslash () path separators or case-insensitive file names, allows remote attackers to access arbitrary files via (1) "..%5c"...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.