CVE-2026-108856

MEDIUM 4.2

UnicomAI Wanwu through 0.6.5 Authorization Bypass via /v1/appspace/app/key AppKey Minting

CVSS Score

4.2

EPSS Score

0.0%

EPSS Percentile

0th

UnicomAI Wanwu through 0.6.5 contains an authorization bypass vulnerability that allows authenticated users to mint AppKeys bound to other users' MCP servers via POST /v1/appspace/app/key. Attackers supplying a victim's MCP server UUID with appType mcpserver can open MCP sessions and invoke the server's tools using the victim's upstream authentication.

CWE	CWE-639
Vendor	unicomai
Product	wanwu
Published	Oct 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

UnicomAI / Wanwu

0 ≤ 0.6.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hackmd.io: https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/unicomai-wanwu-mcp-key-arbitrary-resource github.com: https://github.com/UnicomAI/wanwu/blob/v0.6.5/internal/app-service/client/orm/app_key.go#L37-L49 github.com: https://github.com/UnicomAI/wanwu/blob/v0.6.5/internal/bff-service/server/http/middleware/auth_openapi.go#L46-L70 github.com: https://github.com/UnicomAI/wanwu vulncheck.com: https://www.vulncheck.com/advisories/unicomai-wanwu-through-0.6.5-authorization-bypass-via-v1-appspace-app-key-appkey-minting

Credits

hieuPenguinnn