Integer overflow in Quantumnous New-Api
CVE-2026-71479
New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. Prior to 1.0.0-rc.18, user-controlled image n, video seconds and duration, max_tokens, max_completion_tokens, maxOutputTokens, audio duration, and billing-expression quantities can overflow conversions in common/quota_math.go and related settlement paths, allowing a low-privileged account with positive balance or an active subscription to turn a negative charge into account credit and potentially drain upstream funds. This issue is fixed in version 1.0.0-rc.18.
Vulnerability class: Integer Overflow
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Quantumnous New-api — versions < 1.0.0-rc.18
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-71479?
- CVE-2026-71479 is a critical-severity vulnerability in Quantumnous New-Api, classified under Integer Overflow or Wraparound. CVSS score: 9.1/10. Published 2026-08-17.
- How severe is CVE-2026-71479?
- Critical severity. CVSS v3 base score is 9.1 out of 10.