What is CVE-2026-9733?

CVE-2026-9733 is a critical-severity vulnerability in Hayajo Mojolicious::plugin::web::auth::oauth2, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 9.1/10. Published 2026-06-23.

How severe is CVE-2026-9733?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Hayajo Mojolicious::plugin::web::auth::oauth2

CVE-2026-9733

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-entr…

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Hayajo Mojolicious::plugin::web::auth::oauth2 — versions 0

Weakness classification (CWE)

References

9b29abf9-4ab0-4765-b253-1875cd9b441e
9b29abf9-4ab0-4765-b253-1875cd9b441e (technical-description)
9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-9733?: CVE-2026-9733 is a critical-severity vulnerability in Hayajo Mojolicious::plugin::web::auth::oauth2, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 9.1/10. Published 2026-06-23.
How severe is CVE-2026-9733?: Critical severity. CVSS v3 base score is 9.1 out of 10.