CVE-2026-9306: QuantumNous new-api Midjourney Image Relay Endpoint relay-router.go GetByOnlyMJId authorization
Vulnerability summary
CVE-2026-9306 is a medium (CVSS 6.3) Improper Authorization vulnerability in quantumnous new-api. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.7% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 23-05-2026PublishedVulnerability first disclosed.
- 26-05-2026Last modifiedVulnerability information updated.
Description
A security vulnerability has been detected in QuantumNous new-api up to 0.12.1. This affects the function RelayMidjourneyImage/GetByOnlyMJId of the file router/relay-router.go of the component Midjourney Image Relay Endpoint. Such manipulation leads to authorization bypass. The attack can be launched remotely. The attack requires a high level of complexity. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS metrics
7 scores · 2 sources · 4 versions- NVDNIST2.9LowCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XDiffers
- NVDNIST3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- NVDNIST2.6LowAV:N/AC:H/Au:N/C:P/I:N/A:N
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
22%
Versus all other CVEs
30-day change
Decrease -0.17 pp
From 0.46% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 found13974Ead25Fc6Dac42Fd7Bac62Fbb2Df
Maturity: poc
Weaknesses
CWE · root cause- CWE-285Improper AuthorizationThe product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
- CWE-639Authorization Bypass Through User-Controlled KeyThe system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Quantumnous1 product
- new-api0.12.0 | 0.12.1
1 vendor · 1 product
References
4 links- vuldb.com/submit/812196Third Party Advisory