What’s Vulnerable › Vulnerabilities

CVE-2026-108865: AmoyLab Unla through 0.10.0 OAuth2 Authentication Bypass via /authorize

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-11 · updated 2026-10-16
• Weakness: CWE-287

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.

Affected products

• AmoyLab Unla: through 0.10.0

References

• https://github.com/AmoyLab/Unla
• https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/auth/oauth.go#L86-L147
• https://github.com/AmoyLab/Unla/blob/v0.10.0/internal/core/server.go#L229-L261
• https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/amoylab-unla-oauth-self-issued-token-authz
• https://www.vulncheck.com/advisories/amoylab-unla-through-0.10.0-oauth2-authentication-bypass-via-authorize

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