{"id":"CVE-2026-108865","summary":"AmoyLab Unla through 0.10.0 OAuth2 Authentication Bypass via /authorize","details":"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.","modified":"2026-10-16T02:31:13.239424479Z","published":"2026-10-11T13:26:10.714Z","database_specific":{"cwe_ids":["CWE-287"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108865.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108865.json"},{"type":"ADVISORY","url":"https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/amoylab-unla-oauth-self-issued-token-authz"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108865"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/amoylab-unla-through-0.10.0-oauth2-authentication-bypass-via-authorize"},{"type":"PACKAGE","url":"https://github.com/AmoyLab/Unla"},{"type":"ARTICLE","url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/auth/oauth.go#L86-L147"},{"type":"ARTICLE","url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/core/server.go#L229-L261"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/amoylab/unla","events":[{"introduced":"0"},{"fixed":"5da380b8d883165def1c0a19ec55025ef12db8a5"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"0.10.0"},{"fixed":"0.10.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v0.9.2","v0.9.1","v0.9.0","v0.8.6","v0.8.5","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.1","v0.7.0","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.5.1","v0.5.0","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.11","v0.2.10","v0.2.9","v0.2.8","v0.2.7","v0.2.6","v0.2.5","v0.2.4","v0.2.2","v0.2.1","v0.2.0","v0.1.8","v0.1.7","v0.1.5","v0.1.4","v0.1.3","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108865.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"}]}