CVE-2026-41432Public exploitNetwork attack vector

Quota fraud via empty-key webhook signatures

Published May 8, 2026 · Updated May 8, 2026

Authentication bypass in QuantumNous New API before 0.12.10 allows remote authenticated users to obtain unpaid API quota via forged Stripe webhooks. The StripeWebhook handler accepts a publicly computable HMAC when StripeWebhookSecret retains its empty default, and Recharge credits pending orders without checking their payment gateway. A registered account and any configured payment method are required; repeated forged callbacks convert pending orders into quota while charging the operator for later API use.

CVSS severity7.1
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in QuantumNous New API before 0.12.10 allows remote authenticated users to obtain unpaid API quota via forged Stripe webhooks. The StripeWebhook handler accepts a publicly computable HMAC when StripeWebhookSecret retains its empty default, and Recharge credits pending orders without checking their payment gateway. A registered account and any configured payment method are required; repeated forged callbacks convert pending orders into quota while charging the operator for later API use.

The record

CVE
CVE-2026-41432
Published
May 8, 2026
Updated
May 8, 2026
Vendor
QuantumNous
Product
New API
Classifications
CWE-345, CWE-863, CWE-1188, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 0.12.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

QuantumNous · New APIversion=< 0.12.10

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
7.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
CWE-863Incorrect Authorization
CWE-1188Initialization of a Resource with an Insecure Default
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo