XML External Entity Vulnerability in CVFS Affects Commvault Products
CVE-2026-77090

8.7HIGH

Key Information:

Vendor

Commvault

Status
Commvault Cloud
Grid(hsx) Cvfs
Vendor
CVE Published:
13 October 2026

What is CVE-2026-77090?

The vulnerability in CVFS involves improper handling of XML external entity references, which could potentially allow unauthorized access to sensitive information. This deficiency may lead to information disclosure if exploited. Users are advised to upgrade to the latest maintenance release to mitigate risks associated with this vulnerability.

Affected Version(s)

Commvault Cloud Linux 11.46.0 <= 11.46.29

Commvault Cloud Linux 11.44.0 <= 11.44.24

Commvault Cloud Linux 11.40.0 <= 11.40.77

References

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

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
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.
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