{"id":"CVE-2026-108865","published":"2026-10-11T14:17:06.640","lastModified":"2026-10-16T19:18:44.867","description":"AmoyLab Unla through 0.10.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain valid access tokens because the OAuth2 server never authenticates a resource owner. Attackers can register a client, request a code from /authorize, and exchange it at /token to access OAuth2-protected MCP prefixes, proxied upstream APIs and injected credentials.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","cwes":["CWE-287"],"vendors":[],"products":[],"references":[{"url":"https://github.com/AmoyLab/Unla","tags":[]},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/auth/oauth.go#L86-L147","tags":[]},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/core/server.go#L229-L261","tags":[]},{"url":"https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/amoylab-unla-oauth-self-issued-token-authz","tags":[]},{"url":"https://www.vulncheck.com/advisories/amoylab-unla-through-0.10.0-oauth2-authentication-bypass-via-authorize","tags":[]}],"exploitRefs":[{"url":"https://github.com/AmoyLab/Unla","tags":[]},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/auth/oauth.go#L86-L147","tags":[]},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/core/server.go#L229-L261","tags":[]}],"hasPoc":true,"ai":null}