CVE-2026-108856CWE-639

CVE-2026-108856

Medium · published October 11, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
13.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
2.3 · CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00229 · 13.0th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-10-11T18:17Z
References (6)
https://github.com/UnicomAI/wanwu · [email protected]https://github.com/UnicomAI/wanwu/blob/v0.6.5/internal/app-service/client/orm/app_key.go#L37-L49 · [email protected]https://github.com/UnicomAI/wanwu/blob/v0.6.5/internal/bff-service/server/http/middleware/auth_openapi.go#L46-L70 · [email protected]https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/unicomai-wanwu-mcp-key-arbitrary-resource · [email protected]https://www.vulncheck.com/advisories/unicomai-wanwu-through-0.6.5-authorization-bypass-via-v1-appspace-app-key-appkey-minting · [email protected]https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/cve-2026-108856-unicomai-wanwu-mcp-key-arbitrary-resource · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 13 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 11 OCT 13:26Z
    UnicomAI Wanwu through 0.6.5 Authorization Bypass via /v1/appspace/app/key AppKey Minting
    cvelistv5
  • 11 OCT 13:26Z
    UnicomAI Wanwu through 0.6.5 Authorization Bypass via /v1/appspace/app/key AppKey Minting
    cvelistv5