Path traversal in YARD - #VU126592
Published: April 20, 2026
Vulnerability identifier: #VU126592
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: lsegal
Affected software:
YARD
YARD
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to path traversal in yard server when handling unsanitized HTTP requests. A remote attacker can send a specially crafted request to disclose sensitive information.
Only deployments using yard server to serve documentation in untrusted environments without WEBrick and relying on --docroot are vulnerable.
Remediation
Install security update from vendor's website.