CVE-2026-41213 | BDVDB-2026-328663 Detail

Description#

@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.

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History#

1. Version 12026-04-23Record published in the CVE List.
2. Version 22026-04-25Most recent update recorded in the CVE List.