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TI-2026-11514 Aliases CVE-2026-13591GHSA-4pqr-v6c3-x77j

DeepMyst Mysti Contact Tracking ChannelBridge.ts _isTrackedConversation improper authorization

Priority MEDIUM 45CWE-266Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Privilege escalation, Security bypass
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-266 and CWE-285.

Summary

A weakness has been identified in DeepMyst Mysti 0.4.0. Affected is the function _isTrackedConversation of the file src/managers/ChannelBridge.ts of the component Contact Tracking. This manipulation of the argument _channelType causes improper authorization. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is told to be difficult. The exploit has been made available to the public and could be used for attacks. Patch name: 9b4aff0f106db424aa45a35aa89dd0b8f2eb9a48. It is suggested to install a patch to address this issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00317 24th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DeepMystMysti0.4.0—No fix listedCNA
  • Mysti VendorDeepMyst Affected 0.4.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:deepmyst:mysti:*:*:*:*:*:*:*:*——DeepMyst
  • cpe:2.3:a:deepmyst:mysti:*:*:*:*:*:*:*:* Versions — — ·DeepMyst

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-13591
  2. 2026-10-03 Alias added: GHSA-4pqr-v6c3-x77j

References

Exploit 1

Patch 2

Other 1

  • TI-2026-12309 DeepMyst Mysti Per-Project Auto-Memory MemoryManager.ts initProjectMemory exposure of resource CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences