Quick answers
- Is CVE-2026-108856 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-108856 being exploited in the wild.
- How severe is CVE-2026-108856?
- Medium severity, with a CVSS score of 4.2, published 11 October 2026.
- Which products and versions are affected?
- UnicomAI Wanwu through 0.6.5.
- Is there a fix for CVE-2026-108856?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-108856 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-108856?
- Check whether you run UnicomAI Wanwu at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An authorization bypass in the POST /v1/appspace/app/key endpoint fails to verify that an authenticated user owns the MCP server UUID they specify when minting an AppKey. An attacker with valid authentication can submit a victim's MCP server UUID with appType "mcpserver" to create a key, then use it to open sessions and invoke the server's tools with the victim's upstream authentication credentials.
Affected products
- UnicomAI Wanwu through 0.6.5
Timeline
- 2026-10-11: disclosed