CVE-2026-29200 Auth bypass in Comet Backup
Tenant administrators can impersonate end-user accounts of other tenants via a vulnerable API call, leading to unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-29200?
CVE-2026-29200 is a critical authentication bypass vulnerability in WebPros Comet Backup, published on 4 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A critical IDOR vulnerability has been discovered in Comet Backup affecting all versions from 20.11.0 to 26.1.1 and 26.2.1. The vulnerability allows a tenant administrator to impersonate any end-user account of other tenants on the same server via a vulnerable API call.
Weakness: CWE-639
Which versions are affected by CVE-2026-29200?
How do I fix CVE-2026-29200?
No fix has been published for CVE-2026-29200 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-29200 being exploited?
There is no known exploitation of CVE-2026-29200 in the wild and no public exploit code.
Sources
Also known as GHSA-2fxc-8v96-j5f3.