CVE-2026-32999 Code injection in Comet Backup

Critical 9.1 Published Updated

Authenticated tenant administrators can execute arbitrary code on Comet Backup servers and connected devices due to insufficient character filtering in the signing module.

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-2026-32999?

CVE-2026-32999 is a critical code injection vulnerability in WebPros Comet Backup, published on 28 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-94

Which versions are affected by CVE-2026-32999?

How do I fix CVE-2026-32999?

No fix has been published for CVE-2026-32999 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-32999 being exploited?

There is no known exploitation of CVE-2026-32999 in the wild and no public exploit code.

Sources

Also known as GHSA-x8w2-9wjv-3hv6.

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