CVE-2026-77103 CommServe Information Disclosure

What is CVE-2026-77103?

CVE-2026-77103 is a high-severity authentication bypass vulnerability in Commvault Cloud, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

CommServe contained an authentication bypass issue affecting access authorization and information disclosure. Software customers upgrade to resolved maintenance release. Update CommServe.

Weakness: CWE-288

Which versions are affected by CVE-2026-77103?

It affects 1 product.

Products include Commvault Commvault.

How do I fix CVE-2026-77103?

No fix has been published for CVE-2026-77103 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-77103 being exploited?

There is no known exploitation of CVE-2026-77103 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-6hfr-j2g6-38r3.