Excessive Authentication Vulnerability in OpenCATS Career Portal by OpenCATS
CVE-2026-111874

6.3MEDIUM

Key Information:

Vendor

OpenCATS

Status
Opencats
Vendor
CVE Published:
18 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111874?

A vulnerability has been identified in OpenCATS 0.10.0 within the processLogin function of the CareersUI.php module, which improperly restricts excessive authentication attempts. This flaw potentially allows remote attackers to exploit the system under complex conditions. The maintainers have introduced a patch that enforces repeated authentication for candidates accessing the Career Portal and implements CAPTCHA verification for each login attempt. The previous client-side cookie mechanism for maintaining authenticated user identity has been replaced with a server-side approach, enhancing security. However, it is advised that application-level rate limiting should be handled externally, such as at the network or server level, instead of within OpenCATS' own framework.

Affected Version(s)

OpenCATS 0.10.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-111874 - Proof of Concept

References

https://vuldb.com/vuln/421586
vdb-entrytechnical-description
https://vuldb.com/vuln/421586/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-111874
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

hbynb (VulDB User)
VulDB CNA Team
.