CVE-2026-44177Network attack vector

Pre-authentication PHP file inclusion via user ID traversal

Published Jul 16, 2026 · Updated Jul 16, 2026

Path traversal in Content Folder Kirby 5.3.0 through 5.4.0 allows remote attackers to include arbitrary index.php files via user lookup. The lazy Users collection passes a request-provided user ID into the site/accounts directory lookup without validating characters or containment. The authentication API requires no account, and traversal can load reachable index.php code or reveal whether arbitrary server directories exist.

CVSS severity8.8
High
EPSS probability1.77%
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 Content Folder Kirby 5.3.0 through 5.4.0 allows remote attackers to include arbitrary index.php files via user lookup. The lazy Users collection passes a request-provided user ID into the site/accounts directory lookup without validating characters or containment. The authentication API requires no account, and traversal can load reachable index.php code or reveal whether arbitrary server directories exist.

The record

CVE
CVE-2026-44177
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Content Folder
Product
Kirby
Classifications
CWE-98, CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 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=>= 5.3.0, < 5.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Content Folder · Kirbyversion=>= 5.3.0, < 5.4.1

Published CVSS scores

8.8GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-98Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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