{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-9733: Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-9733","status":"final","version":"1","initial_release_date":"2026-06-23T07:05:20.564Z","current_release_date":"2026-06-23T14:18:05.692Z","revision_history":[{"date":"2026-06-23T07:05:20.564Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter.\n\nWhen 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.\n\nA predictable state allows an attacker to hijack another user's session through cross site request forgery (CSRF).","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-9733 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-9733"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-9733"},{"category":"external","summary":"metacpan.org","url":"https://metacpan.org/release/HAYAJO/Mojolicious-Plugin-Web-Auth-0.17/source/lib/Mojolicious/Plugin/Web/Auth/OAuth2.pm#L129-131"},{"category":"external","summary":"datatracker.ietf.org","url":"https://datatracker.ietf.org/doc/html/rfc6749#section-10.12"},{"category":"external","summary":"security.metacpan.org","url":"https://security.metacpan.org/patches/M/Mojolicious-Plugin-Web-Auth/0.17/CVE-2026-9733-r2.patch"}]},"product_tree":{"branches":[{"category":"vendor","name":"HAYAJO","branches":[{"category":"product_name","name":"Mojolicious::Plugin::Web::Auth::OAuth2","branches":[{"category":"product_version_range","name":"<=0.17","product":{"name":"HAYAJO Mojolicious::Plugin::Web::Auth::OAuth2 <=0.17","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:hayajo:mojolicious\\:\\:plugin\\:\\:web\\:\\:auth\\:\\:oauth2:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-9733","title":"Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter","notes":[{"category":"description","text":"Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter.\n\nWhen 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.\n\nA predictable state allows an attacker to hijack another user's session through cross site request forgery (CSRF).","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}