CVE-2026-64865 New API: Redis user quota cache overwrite via PUT /api/user/self allows quota bypass
An authenticated user can bypass quota limits by racing API requests to overwrite cached quota values in Redis.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64865?
CVE-2026-64865 is a medium-severity vulnerability in QuantumNous new-api, published on 17 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. Prior to 1.0.0-rc.16, repeated PUT /api/user/self requests that update language or sidebar_modules can race relay billing because controller/user.go calls User.Update and updateUserCache performs a full RedisHSetObj write to user:.Quota, overwriting concurrent HINCRBY deductions and allowing an authenticated user to keep cached quota artificially high. This issue is fixed in version 1.0.0-rc.16.
Weakness: CWE-362
Which versions are affected by CVE-2026-64865?
3 open source packages ship an affected version, including github.com/QuantumNous/new-api.
| Package | Affected | Fixed in |
|---|---|---|
github.com/QuantumNous/new-api Go | All versions | 1.0.0-rc.16 |
github.com/QuantumNous/new-api Go | All versions | 1.0.0-rc.16 |
github.com/QuantumNous/new-api Go | All versions | 1.0.0-rc.16 |
How do I fix CVE-2026-64865?
Upgrade github.com/QuantumNous/new-api to 1.0.0-rc.16 or later.
Is CVE-2026-64865 being exploited?
There is no known exploitation of CVE-2026-64865 in the wild and no public exploit code.
Sources
Also known as GHSA-j6gc-4893-qwmp, GO-2026-6243.