{"id":"CVE-2026-108865","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","summary":"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 clie…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","cwe":["CWE-287"],"published":"2026-10-11","updated":"2026-10-11","sourceUpdated":"2026-10-11T14:17:06.640","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108865","references":[{"url":"https://github.com/AmoyLab/Unla","label":"disclosure@vulncheck.com"},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/auth/oauth.go#L86-L147","label":"disclosure@vulncheck.com"},{"url":"https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/core/server.go#L229-L261","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/amoylab-unla-oauth-self-issued-token-authz","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/amoylab-unla-through-0.10.0-oauth2-authentication-bypass-via-authorize","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-12T14:50:34.054Z","slug":"CVE-2026-108865","body":"## Overview\n\nAmoyLab 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}