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CVE-2026-71553— ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS

Quick assessment

Affected
apostrophecms apostrophe
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apostrophe Technologies ApostropheCMS是Apostrophe Technologies公司开源的一个全栈内容管理系统。 Apostrophe Technologies ApostropheCMS 4.32.0及之前版本存在输入验证错误漏洞，该漏洞源于PATCH /api/v1/article/:id接口接受继承的路径toString.call并传递给apos.util.set()和apos.util.get()，允许已认证编辑者覆盖共享的Object.prototype

CVSS 7.1 · High EPSS 0.31% · P24

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
apostrophecms apostrophe <= 4.32.0 affected
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I. Basic Information for CVE-2026-71553

Vulnerability Information
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Vulnerability Title
ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
Apostrophe Technologies ApostropheCMS 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apostrophe Technologies ApostropheCMS是Apostrophe Technologies公司开源的一个全栈内容管理系统。 Apostrophe Technologies ApostropheCMS 4.32.0及之前版本存在输入验证错误漏洞，该漏洞源于PATCH /api/v1/article/:id接口接受继承的路径toString.call并传递给apos.util.set()和apos.util.get()，允许已认证编辑者覆盖共享的Object.prototype
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
apostrophecms apostrophe <= 4.32.0 -

II. Public POCs for CVE-2026-71553

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6693 chars
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III. Intelligence Information for CVE-2026-71553

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Patches & Fixes for CVE-2026-71553 (1)

Vendor Advisories for CVE-2026-71553 (1)

Same Patch Batch · apostrophecms · 2026-08-17 · 4 CVEs total

CVE-2026-63669 6.5 MEDIUM ApostropheCMS: Missing destination-parent authorization in page `move()` allows a low-priv
CVE-2026-63667 6.5 MEDIUM ApostropheCMS: Arbitrary file read via import-export attachment-name path traversal
CVE-2026-63670 6.1 MEDIUM ApostropheCMS: Mutation-XSS / allowedTags bypass via literal `</textarea/>` solidus close

IV. Related Vulnerabilities

Same product: apostrophe
Same vendor: apostrophecms
Same weakness: CWE-1321

V. Comments for CVE-2026-71553

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