PT-2026-51481 · Hayajo · Mojolicious::Plugin::Web::Auth::Oauth2

Published 2026-06-23 · Updated 2026-06-23 · CVE-2026-9733

Mitre

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter.

When no state generator is specified in the constructor, the module defaults to using a SHA-1 hash of predictable and low-entropy sources, including the epoch time (which is leaked via the HTTP Date header) and a call to Perl's built-in rand function.

A predictable state allows an attacker to hijack another user's session through cross site request forgery (CSRF).

Fix

Weakness Enumeration

CWE-340

CWE-338

Related Identifiers

CVE-2026-9733

Affected Products

Mojolicious::Plugin::Web::Auth::Oauth2

References · 5

• https://security.metacpan.org/patches/M/Mojolicious-Plugin-Web-Auth/0.17/CVE-2026-9733-r2.patch · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-9733 · Security Note
• http://openwall.com/lists/oss-security/2026/06/23/1 · Note
• https://datatracker.ietf.org/doc/html/rfc6749#section-10.12 · Note
• https://metacpan.org/release/HAYAJO/Mojolicious-Plugin-Web-Auth-0.17/source/lib/Mojolicious/Plugin/Web/Auth/OAuth2.pm#L129-131 · Note