EUVD-2026-26814CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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:X
Lifecycle Timeline
7DescriptionNVD
A security flaw has been discovered in YunaiV yudao-cloud up to 2026.01. This impacts the function getAccessToken of the file yudao-module-system-biz/src/main/java/io/github/ruoyi/common/oauth2/service/impl/OAuth2TokenServiceImpl.java. Performing a manipulation results in improper authentication. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Authentication bypass in YunaiV yudao-cloud (versions up to 2026.01) allows remote unauthenticated attackers to obtain unauthorized access tokens via manipulation of the getAccessToken function in OAuth2TokenServiceImpl.java. Public exploit code exists (GitHub PoC available), enabling attackers to bypass authentication controls and gain low-level access to confidential data, integrity, and availability. …
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RemediationAI
Within 24 hours: Identify all deployed instances of yudao-cloud and document current versions in use; contact YunaiV for patch status confirmation and estimated timeline. Within 7 days: Implement network segmentation to restrict unauthenticated access to the OAuth2 token endpoint (getAccessToken function) via WAF rules or API gateway controls; enable authentication audit logging on all token requests. …
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External POC / Exploit Code
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