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CVE-2026-41493 — Vulnerability in yard — CVE Details

MEDIUM

yard: Possible arbitrary path traversal and file access via yard server

Published April 17, 2026Updated June 9, 2026Source: osv

Summary

### Impact A path traversal vulnerability was discovered in YARD <= 0.9.41 when using yard server to serve documentation. This bug would allow unsanitized HTTP requests to access arbitrary files on the machine of a yard server host under certain conditions. The original patch in [GHSA-xfhh-rx56-rxcr](https://github.com/lsegal/yard/security/advisories/GHSA-xfhh-rx56-rxcr) was incorrectly applied. ### Patches Please upgrade to YARD v0.9.42 immediately if you are relying on yard server to host documentation in any untrusted environments without WEBrick and rely on `--docroot`. ### Workarounds For users who cannot upgrade, it is possible to perform path sanitization of HTTP requests at your webserver level. WEBrick, for example, can perform such sanitization by default (which you can use via yard server -s webrick), as can certain rules in your webserver configuration.

Advisory Timeline

  • First published April 17, 2026 (178 days ago).
  • Last revised June 9, 2026 — 53 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update yard to 0.9.42 or later
gem install yard -v 0.9.42

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
yard
rubygems
0.2.0, 0.2.1, 0.2.2, 0.2.3 (+92 more)0.9.42

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 5.3 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

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

References

Frequently Asked Questions

What is CVE-2026-41493?
yard: Possible arbitrary path traversal and file access via yard server This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 5.3/10).
How do I check if my project is affected by CVE-2026-41493?
CVE-2026-41493 affects yard. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-41493 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
5.3

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-3jfp-46x4-xgfj

Related CVEs

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