# CVE-2026-71553

## Summary

- **CVE ID:** CVE-2026-71553
- **Severity:** HIGH
- **CVSS Score:** 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)
- **CWE:** CWE-1321
- **Published:** Aug 17, 2026
- **Last Modified:** Aug 17, 2026

## Description

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 Products

- apostrophecms — apostrophe (<= 4.32.0)

## References

- [CNA](https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx)
- [CNA](https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._