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    2 vulnerabilities found for node-oauth2-server by node-oauth

    CVE-2026-41213 (GCVE-0-2026-41213)

    Vulnerability from nvd – Published: 2026-04-23 18:33 – Updated: 2026-04-25 01:23
    VLAI
    Title
    @node-oauth/oauth2-server: PKCE code_verifier ABNF not enforced in token exchange allows brute-force redemption of intercepted authorization codes
    Summary
    @node-oauth/oauth2-server is a module for implementing an OAuth2 server in Node.js. The token exchange path accepts RFC7636-invalid code_verifier values (including one-character strings) for S256 PKCE flows. Because short/weak verifiers are accepted and failed verifier attempts do not consume the authorization code, an attacker who intercepts an authorization code can brute-force code_verifier guesses online until token issuance succeeds.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-307 - Improper Restriction of Excessive Authentication Attempts
    • CWE-1289 - Improper Validation of Unsafe Equivalence in Input
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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    CVE-2026-41213 (GCVE-0-2026-41213)

    Vulnerability from cvelistv5 – Published: 2026-04-23 18:33 – Updated: 2026-04-25 01:23
    VLAI
    Title
    @node-oauth/oauth2-server: PKCE code_verifier ABNF not enforced in token exchange allows brute-force redemption of intercepted authorization codes
    Summary
    @node-oauth/oauth2-server is a module for implementing an OAuth2 server in Node.js. The token exchange path accepts RFC7636-invalid code_verifier values (including one-character strings) for S256 PKCE flows. Because short/weak verifiers are accepted and failed verifier attempts do not consume the authorization code, an attacker who intercepts an authorization code can brute-force code_verifier guesses online until token issuance succeeds.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-307 - Improper Restriction of Excessive Authentication Attempts
    • CWE-1289 - Improper Validation of Unsafe Equivalence in Input
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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