Improper Data Handling in Commvault's Network Messaging Layer
CVE-2026-97334

8.7HIGH

Key Information:

Vendor

Commvault

Status
Commvault Cloud
Vendor
CVE Published:
13 October 2026

What is CVE-2026-97334?

Commvault's network messaging layer is affected by a flaw that involves improper management of highly compressed data, which can lead to disruptions in service availability. Users are strongly advised to upgrade to the latest maintenance release to ensure that all installations, including the CommServe server, Web Server, Command Center, MediaAgents, clients, and HyperScale, are secured against this vulnerability.

Affected Version(s)

Commvault Cloud Windows 11.46.0 <= 11.46.29

Commvault Cloud Windows 11.44.0 <= 11.44.24

Commvault Cloud Windows 11.40.0 <= 11.40.77

References

https://documentation.commvault.com/securityadvisories/CV...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Michael Tucker and Tan Chew Keong from the XOR team at JPMorgan Chase.
.