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TI-2019-08907 Aliases CVE-2019-11879GHSA-jwh5-q83f-2jjc

The WEBrick gem 1.4.2 for Ruby allows directory traversal if the attacker once had local…

Priority LOW 26CWE-22Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

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 of the web root directory. NOTE: The vendor states that this is analogous to Options FollowSymlinks in the Apache HTTP Server, and therefore it is "not a problem.

Why it matters now

EPSS 0.00549 46th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ruby-lang:webrick:1.4.2:*:*:*:*:ruby:*:*1.4.2Vulnerableruby
  • cpe:2.3:a:ruby-lang:webrick:1.4.2:*:*:*:*:ruby:*:* Versions 1.4.2 Vulnerable ·ruby

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-11879
  2. 2026-10-03 Alias added: GHSA-jwh5-q83f-2jjc

References

Advisory 1

  • TI-2009-04253 WEBrick 1.3.1 in Ruby 1.8.6 through patchlevel 383, 1.8.7 through patchlevel 248… CVSS 2.0HIGH 7.5
  • TI-2008-01097 Directory traversal vulnerability in WEBrick in Ruby 1.8 before 1.8.5-p115 and… CVSS 2.0MEDIUM 5.0
  • TI-2020-15633 An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through… CVSS 3.1HIGH 7.5
  • TI-2025-05843 Ruby WEBrick read_header HTTP Request Smuggling Vulnerability CVSS 3.1MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences