AhsayCBS - Authentication Bypass (CVE-2026-105133)

CVE-2026-105133 is an authentication bypass vulnerability in AhsayCBS versions up to 10.3.2, caused by improper handling of the random argument in the API’s checkSysPwd function. Remote unauthenticated attackers may exploit this flaw to bypass authentication and access or affect protected functionality; a public exploit is available, and upgrading to version 10.3.4 mitigates the issue.

CrowdSec has been tracking this vulnerability and its exploits since 22nd of October 2026.

Data from the CrowdSec community indicates that exploitation of CVE-2026-105133 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2026-105133. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.

Observed exploitation attempts target POST /obs/api/json/ListSystemUsers.do with a crafted JSON body containing "FromServlet":"Y". This parameter manipulation may bypass authentication and expose system-user data.