Path traversal in YARD - #VU132274
Published: May 25, 2026
Vulnerability identifier: #VU132274
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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 static cache lookup when handling request paths before router path cleanup. A remote attacker can send a specially crafted request containing parent-directory components to disclose sensitive information.
Only deployments with a configured document root are vulnerable, and only readable regular files reachable through the forced .html suffix can be returned.
Remediation
Install security update from vendor's website.