CVE-2026-71553CWE-1321

CVE-2026-71553

published August 18, 2026

CVSS
7.1
EPSS
0%
Percentile
36.1
In the wild
Unconfirmed
What it is

ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.

The record
Technical detail
CVSS
7.1 · NONE
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00429 · 36.1th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2026-08-18T00:16Z
References (2)
https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd · [email protected]https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx · [email protected]
EPSS history
Timeline
  • 17 AUG 20:03Z
    ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS
    cvelistv5