CVE-2026-41493: YARD is a Ruby Documentation tool

Q: How do I fix CVE-2026-41493?

yard: upgrade to 0.9.42. Exact commands for each OS are on this page.

Q: Is CVE-2026-41493 being exploited?

CVE-2026-41493 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41493 affect?

CVE-2026-41493 affects yard. Severity is high (CVSS 7.5). YARD is a Ruby Documentation tool. Prior to version 0.9.42, a path traversal vulnerability was discovered in YARD when using yard server to serve documentation. This bug would allow unsanitized HTTP requests to access arbitrary files on the

Q: How urgent is CVE-2026-41493?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2026-41493 is a high-severity flaw (CVSS 7.5) affecting yard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

YARD is a Ruby Documentation tool. Prior to version 0.9.42, a path traversal vulnerability was discovered in YARD 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. This issue has been patched in version 0.9.42.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-05-08
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: yardoc

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-08 14:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

yardoc yard UPGRADE

Affected: < 0.9.42

Fixed in: 0.9.42

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy yard || rpm -q yard || yard --version

2. UPGRADE to 0.9.42 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade yard

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade yard

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41493?

yard: upgrade to 0.9.42. Exact commands for each OS are on this page.

Is CVE-2026-41493 being exploited?

CVE-2026-41493 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41493 affect?

CVE-2026-41493 affects yard. Severity is high (CVSS 7.5). YARD is a Ruby Documentation tool. Prior to version 0.9.42, a path traversal vulnerability was discovered in YARD when using yard server to serve documentation. This bug would allow unsanitized HTTP requests to access arbitrary files on the

How urgent is CVE-2026-41493?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Software pages

Ruby vulnerabilities

References

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