CVE-2026-70646
aiosend: Deserialization of request body before signature verification (Pre-auth DoS) in webhook handler
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.
INFO
Published Date :
Aug. 6, 2026, 3:17 p.m.
Last Modified :
Oct. 23, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update aiosend to version 3.0.7.
- Restrict request body size at proxy.
- Rate-limit webhook endpoints.
- Reject oversized requests before parsing.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-70646.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-70646 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-70646
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-70646 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-70646 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: aiosend de vovchic17, Description: aiosend es un cliente API de Crypto Pay síncrono y asíncrono. Antes de la versión 3.0.7, ’WebhookHandler.feed_update()’ deserializa todo el cuerpo de la solicitud antes de verificar la firma HMAC. Esto permite a un atacante no autenticado forzar un análisis costoso de cargas útiles JSON arbitrarias que finalmente serán rechazadas, lo que lleva a un consumo innecesario de CPU y memoria. La versión 3.0.7 soluciona el problema. Algunas soluciones alternativas están disponibles. Restrinja el tamaño del cuerpo de la solicitud en el proxy inverso o framework web, limite la tasa de los puntos finales de webhook y/o rechace las solicitudes de tamaño excesivo antes del análisis JSON. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 08, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-70646', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-08T02:03:28.996737Z'} -
New CVE Received by [email protected]
Aug. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'vovchic17', 'product': 'aiosend', 'versions': [{'status': 'affected', 'version': '< 3.0.6'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-400 Added Reference https://github.com/vovchic17/aiosend/commit/db20f0a742209dfac181863d398ec5112687efa4 Added Reference https://github.com/vovchic17/aiosend/releases/tag/v3.0.7 Added Reference https://github.com/vovchic17/aiosend/security/advisories/GHSA-7m8f-hgjq-8gc9