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Vulnerability record · CVE-2019-11879 · published 10 May 2019

CVE-2019-11879: Ruby-lang webrick path traversal vulnerability

Ruby Lang · Webrick

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.

5.5 CVSS 3.0 Medium EPSS 0.55% · top 56.3% CWE-22 · Path traversalCWE-59 · Link following
5.5CVSS 3.0 base score, v2 2.1
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.ruby-lang.org/issues/15835 Issue TrackingVendor Advisory
https://bugs.ruby-lang.org/issues/15835 Issue TrackingVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-11879), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.