SEPTEMBER 15, 2026
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Case File

CVE-2026-45126

LOW · CVSS 3.5 EPSS 0.13% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-18 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The MyBB forum software prior to version 1.8.40 is vulnerable due to improper validation of the anti-CSRF token in the Admin CP Security Questions module, allowing attackers to manipulate registration challenge questions via crafted URLs. This could lead to unauthorized changes in security settings, potentially compromising the integrity of user registrations. Administrators using affected versions should prioritize updating to 1.8.40 to mitigate this low-severity vulnerability.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-45126
Severity
LOW
CVSS
3.5
EPSS
0.13%

Original NVD 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.