high7.1
CVE-2026-71553
ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | apostrophe | <= 4.32.0 | 4.32.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-vmg4-6gfg-83qx
- 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