hexpm vulnerabilities

hexpm (hex.pm) has a vulnerability of insufficient session expiration in OAuth tokens. A user whose organization membership or session has ended can still read the organization's private packages and documentation via a retained refresh token. Access is read-only and limited to organizations the account belonged to when the token was granted.

hexpm (hex.pm) has a vulnerability due to insufficient session expiration in the OAuth token refresh grant. A user removed from an organization can still read private packages because permission scopes are not properly updated. Affects hex.pm from 2025-10-10 before 2026-08-24.

An incorrect authorization vulnerability in the OAuth token endpoint in hexpm allows an API key with the repositories permission to read another organization's private packages. During key exchange for a token, scope validation does not resolve the organization name against the principal, and repository:<name> scope passes through unchanged. The token grants read access to that organization's private packages until expiration.

hexpm (hex.pm) has a Cross-Site Scripting (XSS) vulnerability in the Elixir.HexpmWeb.SharedAuthorizationView module. The render_grouped_scopes/3 function does not sanitize input, allowing script injection.