CVE-2026-13591 DeepMyst Mysti Contact Tracking ChannelBridge.ts _isTrackedConversation improper authorization
Attackers can bypass authorization checks in the Contact Tracking module to access unauthorized conversation data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13591?
CVE-2026-13591 is a low-severity missing authorization vulnerability in DeepMyst Mysti, published on 29 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-13591?
How do I fix CVE-2026-13591?
No fix has been published for CVE-2026-13591 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-13591 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13591 exists.
Sources
Also known as GHSA-4pqr-v6c3-x77j.