by Kastro
Paper/Archive/CVE-2026-9733

CVE-2026-9733

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

EPSS 0.5%CVSS 9.1
critical.is priorityof 100
36
CVSS 9.1 (ADP)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 44.3.443 × 208.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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).

Affected

ProductAffectedFixed inSource
Mojolicious::Plugin::Web::Auth::OAuth2≤ 0.17–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refmetacpan.org/release/HAYAJO/Mojolicious-Plugin-Web-Auth-0.17/source/lib/Mojolicious/Plugin/Web/Auth/OAuth2.pm#L129-131writeupdatatracker.ietf.org/doc/html/rfc6749#section-10.12patchsecurity.metacpan.org/patches/M/Mojolicious-Plugin-Web-Auth/0.17/CVE-2026-9733-r2.patchrefopenwall.com/lists/oss-security/2026/06/23/1