mediumVulnerability

GHSA-3jfp-46x4-xgfj

### 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.

Properties

ghsa_id
GHSA-3jfp-46x4-xgfj
severity
medium
summary
yard: Possible arbitrary path traversal and file access via yard server
cve_id
GHSA-3jfp-46x4-xgfj
is_ghsa_only
true
ghsa_published
2026-04-17T22:21:03Z
source_url
https://github.com/advisories/GHSA-3jfp-46x4-xgfj
ghsa_updated
2026-04-17T22:21:04Z

Related Entities (4)

REPORTED_BY (1)

[Source]GitHub Advisory Database

VULNERABLE_TO (1)

[Software]rubygems/yard

AFFECTS (1)

[Software]rubygems/yard

HAS_WEAKNESS (1)

[Weakness]Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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