CVE-2026-42069Network attack vector

Authenticated information disclosure via missing read permissions

Published May 9, 2026 · Updated May 9, 2026

Missing authorization in Kirby before 4.9.0 and 5.0.0 through 5.3.3 allows remote authenticated users to read restricted CMS data. Site, user, and role read paths expose models, content, role names, descriptions, and configured permissions because the corresponding access and list permission checks are absent. Any authenticated Panel user can obtain this information unless every user is intentionally permitted to access it; write operations remain gated.

CVSS severity7.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Kirby before 4.9.0 and 5.0.0 through 5.3.3 allows remote authenticated users to read restricted CMS data. Site, user, and role read paths expose models, content, role names, descriptions, and configured permissions because the corresponding access and list permission checks are absent. Any authenticated Panel user can obtain this information unless every user is intentionally permitted to access it; write operations remain gated.

The record

CVE
CVE-2026-42069
Published
May 9, 2026
Updated
May 9, 2026
Vendor
Content Folder
Product
Kirby
Classifications
CWE-862, T1213, T1069, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2026CVE publishedPublication date reported by the CVE source.
  2. May 9, 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=< 4.9.0
  2. Affected versionversion=>= 5.0.0, < 5.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Content Folder · Kirbyversion=< 4.9.0; version=>= 5.0.0, < 5.4.0

Published CVSS scores

7.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories
T1069Permission Groups Discovery
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

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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