CVE-2026-73683— Laravel Socialite Facebook Provider Authentication Bypass via Nonce Replay
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-73683
Vulnerability Information
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Vulnerability Title
Laravel Socialite Facebook Provider Authentication Bypass via Nonce Replay
Source: CVE Program / CVE List V5
Vulnerability Description
Laravel Socialite's Facebook provider contains an authentication bypass vulnerability that allows unauthenticated attackers to replay captured OIDC id_tokens by exploiting the missing nonce claim validation in the getUserByOIDCToken() function within FacebookProvider.php. Attackers who obtain a valid, unexpired id_token issued for the same Facebook App ID can submit the captured token to the backend userFromToken() endpoint, bypassing authentication controls because signature, aud, and iss checks pass while no session-bound nonce comparison is performed, resulting in unauthorized access to victim accounts.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Laravel Socialite 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Laravel Socialite是Laravel组织的一款社交登录认证组件。 Laravel Socialite 5.29.0之前版本存在授权问题漏洞，该漏洞源于FacebookProvider.php中getUserByOIDCToken()函数缺少nonce声明验证，可能导致未认证攻击者重放捕获的OIDC id_token，绕过身份验证控制，未授权访问受害者账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-73683
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 13182 chars
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III. Intelligence Information for CVE-2026-73683
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Patches & Fixes for CVE-2026-73683 (2)
Vendor Advisories for CVE-2026-73683 (1)
Other References for CVE-2026-73683 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-73683
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