Path traversal in YARD - CVE-2026-49342
Published: May 25, 2026
Vulnerability identifier: #VU132274
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2026-49342
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
YARD
openEuler
rubygem-yard
rubygem-yard-doc
openEuler
rubygem-yard
rubygem-yard-doc
How to mitigate CVE-2026-49342
Install security update from vendor's website.
YARD - update to 0.9.44
rubygem-yard - update to 0.9.34-4
rubygem-yard-doc - update to 0.9.34-4
rubygem-yard - update to 0.9.34-4
rubygem-yard-doc - update to 0.9.34-4