ApostropheCMS: GET /api/v1/@apostrophecms/page/:id bypasses viewRole restriction and exposes viewPermission-gated fields to lower-privileged users

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:L/I:N/A:N

EPSS

• CVE-2026-112957: 0.31% estimated exploitation activity in the next 30 days; percentile 23.53 (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 The getOne REST endpoint for pages does not apply viewRole type-level restrictions or viewPermission field-level redaction. An editor-level user who knows a document id can read the full content of admin-only pages and their privileged fields, while the getAll endpoint correctly enforces both restrictions. Details Finding 3 — viewRole bypass: modules/@apostrophecms/page/index.js exposes getRestQuery(req, omitPermissionCheck = false). The getAll path calls publicApiCheckAsync and threads the full query builder pipeline including viewRole filtering. The getOne path uses a divergent code path that skips this pipeline. A page type declared with viewRole: 'admin' is inaccessible via GET /api/v1/@apostrophecms/page?type=secretPage (returns 403 to an editor) but is fully returned by GET /api/v1/@apostrophecms/page/:id:en:published to the same editor. Finding 4 — viewPermission field leak: Fields decorated with viewPermission: { action: 'edit', type: '@apostrophecms/page' } are…

Published by the source

21 Oct 2026, 17:15 UTC

Last modified by the source

21 Oct 2026, 17:28 UTC

Source last checked

26 Oct 2026, 13:07 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-vh56-5m88-39rq

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-vh56-5m88-39rq

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-vh56-5m88-39rq

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# Patch Next advisory brief: CVE-2026-112957

Advisory: ApostropheCMS: GET /api/v1/@apostrophecms/page/:id bypasses viewRole restriction and exposes viewPermission-gated fields to lower-privileged users
IDs: CVE-2026-112957, GHSA-vh56-5m88-39rq
Record: https://patchnext.com/advisories/cve-2026-112957 (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 4.34.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm apostrophe: affected < 4.34.0; fixed in 4.34.0

## 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-vh56-5m88-39rq (GitHub-reviewed advisory GHSA-vh56-5m88-39rq lists affected ranges: npm apostrophe >=0 <4.34.0)
- Verified: https://osv.dev/vulnerability/GHSA-vh56-5m88-39rq (OSV record GHSA-vh56-5m88-39rq lists affected ranges: npm apostrophe >=0 <4.34.0 (fixed))

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