CVE-2026-49342Public exploitNetwork attack vector

Unauthenticated HTML disclosure via raw cache paths

Published Jun 19, 2026 · Updated Jun 19, 2026

Path traversal in YARD before 0.9.44 allows remote attackers to read sibling HTML files through a reachable documentation server. StaticCaching#check_static_cache joins the raw request path to adapter.document_root and returns a regular file before Router#final_options cleans parent-directory components. Exploitation requires --docroot or DocumentRoot, a reachable server, and a readable off-root file ending in .html; it provides no write or execution path.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in YARD before 0.9.44 allows remote attackers to read sibling HTML files through a reachable documentation server. StaticCaching#check_static_cache joins the raw request path to adapter.document_root and returns a regular file before Router#final_options cleans parent-directory components. Exploitation requires --docroot or DocumentRoot, a reachable server, and a readable off-root file ending in .html; it provides no write or execution path.

The record

CVE
CVE-2026-49342
Published
Jun 19, 2026
Updated
Jun 19, 2026
Vendor
Loren Segal
Product
YARD
Classifications
CWE-22, T1190, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.9.44

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Loren Segal · YARDversion=< 0.9.44

Published CVSS scores

5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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