Excessive Authentication Attempts Vulnerability in Karakeep-App by Karakeep
CVE-2026-75773

6.3MEDIUM

Key Information:

Vendor

Karakeep-app

Status
Karakeep
Vendor
CVE Published:
18 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-75773?

A vulnerability exists in the Login Endpoint of the Karakeep application that allows for improper restriction of excessive authentication attempts. This flaw arises from the function 'authorize' in the auth.ts file, which could potentially be exploited remotely. Although the exploitation is characterized by high complexity, it has been publicly disclosed, making it a significant concern for users of the software. It is strongly recommended to upgrade to version 0.33.0 where the issue has been addressed with an official patch.

Affected Version(s)

karakeep 0.1

karakeep 0.2

karakeep 0.3

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-2026-75773 - Proof of Concept

References

https://vuldb.com/vuln/391519
vdb-entrytechnical-description
https://vuldb.com/vuln/391519/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-75773
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

ZAST.AI (VulDB User)
.