CVE-2026-70646Network attack vector

Webhook service interruption via pre-authentication JSON parsing

Published Aug 6, 2026 · Updated Aug 6, 2026

Uncontrolled resource consumption in vovchic17 aiosend before 3.0.7 allows remote attackers to interrupt webhook services. WebhookHandler.feed_update() fully deserializes each JSON body with Pydantic before checking its HMAC signature, and retained extra fields amplify memory use. Network access to an integrating application's webhook endpoint is sufficient; repeated large requests consume CPU and memory until that service becomes unavailable.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in vovchic17 aiosend before 3.0.7 allows remote attackers to interrupt webhook services. WebhookHandler.feed_update() fully deserializes each JSON body with Pydantic before checking its HMAC signature, and retained extra fields amplify memory use. Network access to an integrating application's webhook endpoint is sufficient; repeated large requests consume CPU and memory until that service becomes unavailable.

The record

CVE
CVE-2026-70646
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
vovchic17
Product
aiosend
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

vovchic17 · aiosendversion=< 3.0.6

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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