ApostropheCMS: Same-parent page reorder in @apostrophecms/page move() re-ranks a restricted parent's children without create authorization

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS

• CVE-2026-113655: 0.32% estimated exploitation activity in the next 30 days; percentile 25.40 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary ApostropheCMS enforces per-type authorization on pages: a page type may declare editRole / publishRole (the core @apostrophecms/archive-page does), so a project can define restricted subtrees that only higher-privileged roles may create or edit within. The move() operation in the @apostrophecms/page module is supposed to enforce that a page may only be moved into a parent the actor has create rights over, the same boundary the page-insert route enforces. The destination-parent authorization check in move() is gated on the move being a cross-parent move (oldParent.id !== parent.id). A same-parent reorder (repositioning a page among its existing siblings under the same parent) short-circuits that check entirely, so an authenticated low-privileged editor who holds edit rights on one ordinary page nested under a restricted parent can reposition it and, in doing so, trigger an unguarded bulk database write that re-ranks the restricted parent's other children, documents the editor…

Published by the source

20 Oct 2026, 18:04 UTC

Last modified by the source

20 Oct 2026, 18:15 UTC

Source last checked

26 Oct 2026, 13:07 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-2jrp-qc93-h2j8

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-2jrp-qc93-h2j8

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-2jrp-qc93-h2j8

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# Patch Next advisory brief: CVE-2026-113655

Advisory: ApostropheCMS: Same-parent page reorder in @apostrophecms/page move() re-ranks a restricted parent's children without create authorization
IDs: CVE-2026-113655, GHSA-2jrp-qc93-h2j8
Record: https://patchnext.com/advisories/cve-2026-113655 (revision 3, source checked 26 Oct 2026, 13:07 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: apostrophe 4.33.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm apostrophe: affected < 4.33.0; fixed in 4.33.0

## Suggested inspection (read-only)
- `npm ls apostrophe --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on apostrophe.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-2jrp-qc93-h2j8 (GitHub-reviewed advisory GHSA-2jrp-qc93-h2j8 lists affected ranges: npm apostrophe >=0 <4.33.0)
- Verified: https://osv.dev/vulnerability/GHSA-2jrp-qc93-h2j8 (OSV record GHSA-2jrp-qc93-h2j8 lists affected ranges: npm apostrophe >=0 <4.33.0 (fixed))

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