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ApostropheCMS: :_id/locales REST route omits the public-API authorization gate its sibling read routes enforce (unauthenticated doc-existence + locale metadata disclosure)GHSA-gqh3-7856-rjjg

MEDIUMFix: apostrophecms/apostrophe@9500b8b

GHSA-gqh3-7856-rjjg is a medium-severity (CVSS 5.3) Information Exposure vulnerability in apostrophe. A fix is available for apostrophe — see the affected versions and patch details below.

Also known asCVE-2026-113668
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs24th percentile — riskier than 24% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-gqh3-7856-rjjg by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 394,803 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

8other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
apostrophenpm
16Kdownloads / week

Description

Summary

The REST route GET /api/v1/<piece-type>/:_id/locales (and the equivalent page route) does not apply the publicApiCheckAsync gate that ApostropheCMS's other read routes enforce. An unauthenticated caller can therefore query this route for any document _id and learn whether the document exists and which locales it is published in — a document-existence and locale-metadata disclosure that the read-API is otherwise supposed to gate.

Affected

  • Repository: apostrophecms/apostrophe (monorepo package apostrophe).
  • Confirmed at 4.32.2 (commit d3ff8c9 == the shipped 4.32.2; unchanged at current HEAD). No fix at time of report.
  • Stack: Node.js / Express + MongoDB.
  • Endpoints: GET /api/v1/<piece-type>/:_id/locales and GET /api/v1/@apostrophecms/page/:_id/locales.

Technical detail

  • Unsafe: modules/@apostrophecms/piece-type/index.js:397 registers the :_id/locales route with no publicApiCheckAsync. The page module has the same omission at modules/@apostrophecms/page/index.js:925.
  • Gated siblings: the read routes in the same module (e.g. getAll at piece-type/index.js:256-263) call publicApiCheckAsync (:263) to enforce the public-API access policy.
  • So the locales handler (which calls getLocales() for the document) runs for any caller regardless of the public-API gate the other read routes apply, returning the document's locale/publication metadata without authorization.

Impact

An unauthenticated caller can confirm the existence of a document by _id and enumerate its locales/publication state — information the read-API is meant to gate. Defensibly 4.3 (AC:H) given the opaque _id precondition (the caller needs a document id).

How it was verified (local only)

Reproduced against [email protected] (== commit d3ff8c9) locally with synthetic content:

  • Source review confirmed the :_id/locales route lacks publicApiCheckAsync while the sibling read routes have it.
  • An unauthenticated GET /api/v1/<piece-type>/<_id>/locales returned the document's locale metadata (existence + locales), while the gated read routes (e.g. getAll) correctly required the public-API policy.
  • Control: the same route with the publicApiCheckAsync gate added (matching the siblings) denies the unauthenticated request — isolating the missing gate as the cause. Synthetic content only; nothing hosted was touched.

Remediation

Add the publicApiCheckAsync (or equivalent) authorization gate to the :_id/locales route in both the piece-type and page modules, matching the sibling read routes, so the locale/existence metadata is only returned to callers permitted by the public-API policy.

Credit

Please credit Santosh Kumar Puppala (https://github.com/Santoshkumarpuppala).

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmapostropheall versions4.33.0npm install apostrophe@4.33.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for apostrophe, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update apostrophe to 4.33.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-gqh3-7856-rjjg is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

## Summary The REST route `GET /api/v1/<piece-type>/:_id/locales` (and the equivalent page route) does not apply the `publicApiCheckAsync` gate that ApostropheCMS's other read routes enforce. An unauthenticated caller can therefore query this route for any document `_id` and learn whether the document exists and which locales it is published in — a document-existence and locale-metadata disclosure that the read-API is otherwise supposed to gate. ## Affected - Repository: `apostrophecms/apostrophe` (monorepo package `apostrophe`). - Confirmed at **4.32.2** (commit `d3ff8c9` == the shipped 4.3
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