Report: Essential Guide: CVE-2026-41213 - @node-oauth/oauth2-server: PKCE code_verifier ABNF not enforced in token exchang...
CVE ID :CVE-2026-41213 Published : April 23, 2026, 7:17 p.m. | 27 minutes ago 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. Severity: 5.9 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...