CVE-2026-77091 DataCube Security Feature Bypass

What is CVE-2026-77091?

CVE-2026-77091 is a high-severity path traversal vulnerability in Commvault Cloud, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

DataCube contained a path traversal issue affecting security feature enforcement. Software customers upgrade to resolved maintenance release. Update Content Extractor and Index Store.

Weakness: CWE-22

Which versions are affected by CVE-2026-77091?

It affects 1 product.

Products include Commvault Commvault.

How do I fix CVE-2026-77091?

No fix has been published for CVE-2026-77091 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-77091 being exploited?

There is no known exploitation of CVE-2026-77091 in the wild and no public exploit code.

Other vulnerabilities in Commvault Cloud

• CVE-2025-34028 Commvault Command Center Path Traversal Exploited Critical 9.3
• CVE-2025-3928 Commvault Web Server Unspecified Exploited High 8.7
• CVE-2017-18044 Command injection in n/a Critical 9.8
• CVE-2026-77089 Command Center API Authentication Bypass Critical 9.3
• CVE-2026-13737 Command Restriction Bypass Critical 9.2

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-6mxj-q892-9qxf.