CVE-2026-29200 PUBLISHED

Assigner: hackerone
Reserved: 04.03.2026 Published: 04.05.2026 Updated: 04.05.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:H
CVSS Score: 9.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	WebPros
Product	Comet Backup
Versions	Default: unaffected affected from 20.11.0 to 26.1.2 (excl.) affected from 26.2.0 to 26.2.2 (excl.)

References

https://support.cometbackup.com/hc/en-us/articles/40090945484823--CVE-2026-29200-%D0%A1ritical-IDOR-vulnerability-in-Comet-Backup

Problem Types

CWE-639 Insecure Direct Object Reference (IDOR) CWE