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CVE-2026-32141— flatted: Unbounded recursion DoS in parse() revive phase

Quick assessment

Affected
WebReflection flatted
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.

flatted是Andrea Giammarchi个人开发者的一个轻量快速的循环JSON解析器。 flatted 3.4.0之前版本存在安全漏洞，该漏洞源于parse函数在处理特制负载时递归深度无限制，可能导致堆栈溢出并使Node.js进程崩溃。

CVSS 7.5 · High EPSS 0.81% · P54

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
WebReflection flatted < 3.4.0 affected
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I. Basic Information for CVE-2026-32141

Vulnerability Information
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Vulnerability Title
flatted: Unbounded recursion DoS in parse() revive phase
Source: CVE Program / CVE List V5
Vulnerability Description
flatted is a circular JSON parser. Prior to 3.4.0, flatted's parse() function uses a recursive revive() phase to resolve circular references in deserialized JSON. When given a crafted payload with deeply nested or self-referential $ indices, the recursion depth is unbounded, causing a stack overflow that crashes the Node.js process. This vulnerability is fixed in 3.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
flatted 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
flatted是Andrea Giammarchi个人开发者的一个轻量快速的循环JSON解析器。 flatted 3.4.0之前版本存在安全漏洞，该漏洞源于parse函数在处理特制负载时递归深度无限制，可能导致堆栈溢出并使Node.js进程崩溃。
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
WebReflection flatted < 3.4.0 -

II. Public POCs for CVE-2026-32141

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5932 chars
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III. Intelligence Information for CVE-2026-32141

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Patches & Fixes for CVE-2026-32141 (2)

Vendor Advisories for CVE-2026-32141 (1)

IV. Related Vulnerabilities

Same product: flatted
Same vendor: WebReflection
Same weakness: CWE-674

V. Comments for CVE-2026-32141

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