Vulnerability Description
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).
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://datatracker.ietf.org/doc/html/rfc6749#section-10.12
- https://metacpan.org/release/HAYAJO/Mojolicious-Plugin-Web-Auth-0.17/source/lib/
- https://security.metacpan.org/patches/M/Mojolicious-Plugin-Web-Auth/0.17/CVE-202
- http://www.openwall.com/lists/oss-security/2026/06/23/1
FAQ
What is CVE-2026-9733?
CVE-2026-9733 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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...
How severe is CVE-2026-9733?
CVE-2026-9733 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-9733?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.