Resource exhaustion in Vovchic17 Aiosend
CVE-2026-70646
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.004 (28.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Vovchic17 Aiosend — versions < 3.0.6
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-70646?
- CVE-2026-70646 is a high-severity vulnerability in Vovchic17 Aiosend, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-06.
- How severe is CVE-2026-70646?
- High severity. CVSS v3 base score is 7.5 out of 10.