What is GHSA-vmg4-6gfg-83qx?

GHSA-vmg4-6gfg-83qx is a security advisory published by GitHub Security Advisories with High severity. ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS

Which CVE IDs does GHSA-vmg4-6gfg-83qx cover?

GHSA-vmg4-6gfg-83qx covers the following CVE IDs: CVE-2026-71553. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-vmg4-6gfg-83qx?

GHSA-vmg4-6gfg-83qx affects 1 product, including: npm/apostrophe:\u003c= 4.32.0.

GHSA-vmg4-6gfg-83qxHigh

ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS

Vendor

GitHub Security Advisories

Published

September 2, 2026

Last Modified

September 2, 2026

🔗 CVE IDs covered (1)

CVE-2026-71553 →

📋 Description

The vulnerability is a single-request persistent DoS by submitting e.g. "PATCH /api/v1/article/" with a valid editor session and body of {"toString.call":"x"}, overwriting the global toString function with value x.

Fabian

🎯 Affected products1

npm/apostrophe:<= 4.32.0

🔗 References (4)

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx
https://nvd.nist.gov/vuln/detail/CVE-2026-71553
https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd
https://github.com/advisories/GHSA-vmg4-6gfg-83qx