Improper Authorization in DeepMyst Mysti 0.4.0 Affects Contact Tracking Functionality
CVE-2026-13591

2.3LOW

Key Information:

Vendor

Deepmyst

Status
Mysti
Vendor
CVE Published:
29 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13591?

A vulnerability has been discovered in DeepMyst Mysti 0.4.0, specifically within the Contact Tracking component's _isTrackedConversation function found in src/managers/ChannelBridge.ts. This flaw occurs due to improper handling of the _channelType argument, allowing unauthorized access. The vulnerability can be exploited remotely, although it requires a heightened level of complexity for successful execution. Publicly available exploits may facilitate potential attacks. It is crucial for users to apply the patch 9b4aff0f106db424aa45a35aa89dd0b8f2eb9a48 to mitigate this security risk.

Affected Version(s)

Mysti 0.4.0

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-2026-13591 - Proof of Concept

References

https://vuldb.com/vuln/374594
vdb-entrytechnical-description
https://vuldb.com/vuln/374594/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13591
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

dem0000 (VulDB User)
.