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Missing AuthorizationWeakness · CWE-862

CVE-2026-54005

HIGH · 7.1 CVSS v4.0 Published 2026-07-09
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
77/100
Remediation priority · High
Remotely reachable Zero-click Patch available 6 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites where a role has the pages.access permission disabled allowed authenticated users who know or guess page IDs or UUIDs to retrieve page information, including full content and metadata, for arbitrary published pages through the /api/site/find route without authorization to access those pages. This issue is fixed in versions 4.9.4 and 5.4.4.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-862

The application checks who you are but not whether you're allowed to perform a given action, so any authenticated user can reach things meant for others. This is the classic “change the ID in the URL” bug. The fix is an authorization check on every request, evaluated against the acting user's permissions.

General guidance for the missing authorization class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
Authentication
X
User interaction
None
Scope
X

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

Kirby CMS 4.9.4 (for 4.x) or 5.4.4 (for 5.x)

  1. 1. Identify the currently installed Kirby version by checking the composer.json or kirby/composer.json file in the project
  2. 2. If running Kirby 4.x: Upgrade to version 4.9.4 or later using composer require kirby/composer=4.9.4 or composer update kirby/core
  3. 3. If running Kirby 5.x: Upgrade to version 5.4.4 or later using composer require kirby/composer=5.4.4 or composer update kirby/core
  4. 4. Clear any cached data (vendor/.cache, site/.cache, or similar cache directories)
  5. 5. Test the application to ensure the upgrade did not break functionality
  6. 6. Verify the fix by confirming that users with pages.access permission disabled can no longer access arbitrary page content via /api/site/find
Caveat Upgrading from Kirby 4.x to 5.x may have breaking changes; minor version upgrades within 4.x or 5.x typically have minimal breaking changes

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-54005 in production — separate from our analysis above.

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