{"apiVersion":"1.0","identifier":"CVE-2026-45126","description":"MyBB is free and open source forum software. Prior to 1.8.40, the Admin CP Security Questions module does not validate the anti-CSRF token correctly, allowing same-site attackers to enable or disable registration challenge questions with a specially crafted URL. The controller processes GET requests for the disable and enable actions to modify mybb_questions.active without verifying the my_post_key token attached by the user interface. The uniquely identifying implementation details include admin/modules/config/questions.php. This issue is fixed in version 1.8.40.","publishedAt":"2026-08-18T16:17:07","lastModifiedAt":"2026-08-18T18:17:36","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45126","cvssScore":3.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","epssProbability":0.00132,"riskScore":0.35,"affectedProduct":"MyBB","affectedVersions":"<1.8.40","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-45126","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-45126","en":"https://www.redsauce.net/en/cves/CVE-2026-45126","fr":"https://www.redsauce.net/fr/cves/CVE-2026-45126","pt":"https://www.redsauce.net/pt/cves/CVE-2026-45126","de":"https://www.redsauce.net/de/cves/CVE-2026-45126","sk":"https://www.redsauce.net/sk/cves/CVE-2026-45126","el":"https://www.redsauce.net/el/cves/CVE-2026-45126"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-45126"}}