CVE-2026-54659Public exploitNetwork attack vector

YAML file probing via unvalidated locale path

Published Jul 28, 2026 · Updated Jul 28, 2026

Path traversal in Pagy 43.0.0 through 43.5.5 allows remote attackers to probe the existence and readability of host YAML files. Pagy::I18n.locale= stores an assigned locale verbatim, and the loader joins it into a locale-named YAML path before YAML.load_file reads it. Exploitation requires an application to pass unsanitized end-user input to the setter; results reveal a YAML file's existence or readability, not its contents.

CVSS severity6.9
Medium
EPSS probability0.37%
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 Pagy 43.0.0 through 43.5.5 allows remote attackers to probe the existence and readability of host YAML files. Pagy::I18n.locale= stores an assigned locale verbatim, and the loader joins it into a locale-named YAML path before YAML.load_file reads it. Exploitation requires an application to pass unsanitized end-user input to the setter; results reveal a YAML file's existence or readability, not its contents.

The record

CVE
CVE-2026-54659
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
ddnexus
Product
Pagy
Classifications
CWE-200, CWE-22, T1083
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 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=>= 43.0.0, < 43.5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ddnexus · Pagyversion=>= 43.0.0, < 43.5.6

Published CVSS scores

6.9GitHub, Inc.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

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1083File and Directory Discovery

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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