Reliance on Security Through Obscurity in Accessible Form Captcha - CVE-2026-112067
Published: October 21, 2026
Vulnerability identifier: #VU156710
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-112067
CWE-ID: CWE-656
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to embedding the correct CAPTCHA answer directly inside the image data in the default configuration. A remote attacker can request a CAPTCHA image and read the answer from it and submit it.
Affected software
Accessible Form Captcha
How to mitigate CVE-2026-112067
Install updates from vendor's website.
Accessible Form Captcha - update to 5.4.2