CVE-2026-32999 Details
Description
Insufficient character filtering in backup agent signing module on Comet Backup server allows authenticated tenant administrator to execute an arbitrary code on behalf of a privileged user on the affected server and connected devices.
A remote code execution vulnerability has been identified in Comet Backup server versions prior to 26.4.3 and 26.5.0. This vulnerability arises from inadequate character filtering in the backup agent signing module, allowing authenticated tenant administrators with branding permissions to execute arbitrary code on behalf of a privileged user. The exploitation involves uploading malicious .dll or .so files as code-signing executables within the branding configuration, which are then executed when a backup-tool client is generated.
Comet Backup has been upgraded on hosted servers, requiring no action from Comet Hosted administrators. For self-hosted instances, Comet Backup should be updated to version 26.4.3, 26.5.0 or higher.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 28, 2026CISA-ADP
Assessed May 28, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://support.cometbackup.com/hc/en-us/articles/40655100268439--CVE-2026-32999-RCE-on-Comet-Server-via-branding-configuration | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Comet Backup | < 26.4.3 (semver) < 26.5.0 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 28, 2026 | New CVE Received | [email protected] |