CVE-2026-108856 json
UnicomAI Wanwu through 0.6.5 Authorization Bypass via /v1/appspace/app/key AppKey Minting
published 29d ago modified 24d ago also EUVD-2026-97007
- cvss
- 4.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
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.
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 27d ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- hackmd.io https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/cve-2026-108856-unicomai-wanwu-mcp-key-arbitrary-resource referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 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 |
| CNA | 3.1 | 4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
| CNA | 4.0 | 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/E:X/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 |
Affected products
- UnicomAI Wanwu
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
hackmd.io
/@1ExmmukzRMWN7B4gQ4W-4Q/cve-2026-108856-unicomai-wanwu-mcp-key-arbitrary-resource
exploit
-
hackmd.io
/@1ExmmukzRMWN7B4gQ4W-4Q/unicomai-wanwu-mcp-key-arbitrary-resource
third-party-advisory
-
github.com
/UnicomAI/wanwu/blob/v0.6.5/internal/app-service/client/orm/app_key.go#L37-L49
technical-description
-
github.com
/UnicomAI/wanwu/blob/v0.6.5/internal/bff-service/server/http/middleware/auth_openapi.go#L46-L70
technical-description
-
github.com
/UnicomAI/wanwu
product
-
vulncheck.com
/advisories/unicomai-wanwu-through-0.6.5-authorization-bypass-via-v1-appspace-app-key-appkey-minting
third-party-advisory
Sources
- CVE List CVE-2026-108856
- NVD CVE-2026-108856
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.