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CVE-2026-70646— aiosend: Deserialization of request body before signature verification (Pre-auth DoS) in webhook handler

Quick assessment

Affected
vovchic17 aiosend
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.

VoVcHiC aiosend是VoVcHiC个人开发者的一个消息发送的开发框架。 VoVcHiC aiosend 3.0.6之前版本存在资源管理错误漏洞，该漏洞源于WebhookHandler.feed_update()在验证HMAC签名之前反序列化整个请求体，可能导致未经身份验证的攻击者强制解析任意JSON负载，造成CPU和内存消耗。

CVSS 7.5 · High EPSS 0.64% · P48

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
vovchic17 aiosend < 3.0.6 affected
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I. Basic Information for CVE-2026-70646

Vulnerability Information
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Vulnerability Title
aiosend: Deserialization of request body before signature verification (Pre-auth DoS) in webhook handler
Source: CVE Program / CVE List V5
Vulnerability Description
aiosend is a synchronous and asynchronous Crypto Pay API client. Pror to version 3.0.7, `WebhookHandler.feed_update()` deserializes the entire request body before verifying the HMAC signature. This allows an unauthenticated attacker to force expensive parsing of arbitrary JSON payloads that will ultimately be rejected, leading to unnecessary CPU and memory consumption. Version 3.0.7 fixes the issue. Some workarounds are available. Restrict request body size at the reverse proxy or web framework, rate-limit webhook endpoints, and/or reject oversized requests before JSON parsing.
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
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
VoVcHiC aiosend 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VoVcHiC aiosend是VoVcHiC个人开发者的一个消息发送的开发框架。 VoVcHiC aiosend 3.0.6之前版本存在资源管理错误漏洞，该漏洞源于WebhookHandler.feed_update()在验证HMAC签名之前反序列化整个请求体，可能导致未经身份验证的攻击者强制解析任意JSON负载，造成CPU和内存消耗。
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
vovchic17 aiosend < 3.0.6 -

II. Public POCs for CVE-2026-70646

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8591 chars
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III. Intelligence Information for CVE-2026-70646

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Patches & Fixes for CVE-2026-70646 (2)

Vendor Advisories for CVE-2026-70646 (1)

IV. Related Vulnerabilities

Same weakness: CWE-400

V. Comments for CVE-2026-70646

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