Paper/Archive/CVE-2026-29200

CVE-2026-29200

WebPros Comet Backup — 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.

EPSS 0.3%CVSS 9.9

critical.is priorityof 100

CVSS 9.9 (CNA)9.9 / 10 × 3029.7 Not in CISA KEV+300.0 EPSS percentile 22.4.224 × 204.5 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Comet Backup20.11.0 – < 26.1.226.1.2CNA

Comet Backup26.2.0 – < 26.2.226.2.2CNA

Scores by source

hackerone (CNA)9.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

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