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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
WebPros Comet Backup unaffected
Version Status Constraints
20.11.0 affected < 26.1.2
26.2.0 affected < 26.2.2

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Mon, 04 May 2026 07:45:00 +0000

Type Values Removed Values Added
Title Critical IDOR in Comet Backup Enables Tenant Admin Impersonation

Mon, 04 May 2026 06:45:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-639
References
Metrics cvssV4_0

{'score': 9.9, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-05-04T05:42:15.576Z

Reserved: 2026-03-04T15:00:09.266Z

Link: CVE-2026-29200

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-04T07:16:00.100

Modified: 2026-05-04T07:16:00.100

Link: CVE-2026-29200

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-04T07:30:40Z

Weaknesses