{"id":"CVE-2026-108865","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-108865","generatedAt":"2026-10-28T01:03:26.769Z","title":"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.","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.","published":"2026-10-11T14:17:07.000Z","lastModified":"2026-10-16T19:18:45.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":8.8,"severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-287"],"affected":[],"epss":{"score":0.00324,"percentile":0.25198,"date":"2026-10-26","history":[{"date":"2026-10-12","score":0.00324,"percentile":0.23528}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-11T14:17:07.000Z","detail":{"score":"8.8","severity":"HIGH","publishedAt":"2026-10-11T14:17:06.640Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://github.com/AmoyLab/Unla","source":"disclosure@vulncheck.com"},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/auth/oauth.go#L86-L147","source":"disclosure@vulncheck.com"},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/core/server.go#L229-L261","source":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/amoylab-unla-oauth-self-issued-token-authz","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/amoylab-unla-through-0.10.0-oauth2-authentication-bypass-via-authorize","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-108865","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}