What’s Vulnerable › Vulnerabilities

CVE-2017-17042

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-28 · updated 2026-06-17
• Weakness: CWE-22

Description

lib/yard/core_ext/file.rb in the server in YARD before 0.9.11 does not block relative paths with an initial ../ sequence, which allows attackers to conduct directory traversal attacks and read arbitrary files.

Affected products

• lsegal yard: before 0.9.11 — fixed in 0.9.11

How to fix

Upgrade to a fixed version: lsegal yard 0.9.11. Check the vendor advisory for mitigations.

References

• https://github.com/lsegal/yard/commit/b0217b3e30dc53d057b1682506333335975e62b4
• https://github.com/lsegal/yard/commit/b0217b3e30dc53d057b1682506333335975e62b4

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