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Advisory record · GHSA-vh56-5m88-39rq

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

CVSS 4.3 MediumEPSS 0.0031 · 23rd percentile

Published by the GitHub Advisory Database at 21 Oct 2026, 17:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
apostrophenpm<4.34.04.34.0
Identifiers
GHSA-vh56-5m88-39rq · CVE-2026-112957
Weakness (CWE)
CWE-862
Tags
Published
21 Oct 2026
Updated
21 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

ApostropheCMS versions before 4.34.0 (npm package apostrophe) have a flaw in the single-page REST endpoint GET /api/v1/@apostrophecms/page/:id, which does not apply page type viewRole restrictions or viewPermission field-level redaction that the list endpoint enforces. An attacker needs a valid editor-level account and a document _id, which they could know or guess, and could then read the full content of admin-only pages and fields gated by viewPermission. Upgrade to apostrophe 4.34.0 or later, which contains the fix.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
4.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0031, the 23rd percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.