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TI-2026-71791 Aliases CVE-2026-77090GHSA-g9jj-cpxw-62v5

XML external entity flaw in Commvault CVFS leaks information

Priority MEDIUM 44CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-611 and the CVSS impact.

Summary

Commvault Cloud from 11.46.0 through 11.46.29, from 11.44.0 through 11.44.24, from 11.40.0 through 11.40.77 and from 11.36.0 through 11.36.126, and Commvault Grid(HSX) CVFS from 5.0.1.0 through 5.0.14.4 are affected. CVFS handles XML external entity references improperly (CWE-611), which causes an information disclosure. A remote attacker without privileges or user interaction can read information with high confidentiality impact.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

CVFS contained an XML external entity (XXE) reference handling issue affecting information dislcosure. Software customers upgrade to resolved maintenance release. Update CVFS.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0033 26th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CommvaultCommvault Cloud11.46.0 – 11.46.29; 11.44.0 – 11.44.24; 11.40.0 – 11.40.77; 11.36.0 – 11.36.126—No fix listedCNA
CommvaultGrid(HSX) CVFS5.0.1.0 – 5.0.14.4—No fix listedCNA
  • Commvault Cloud VendorCommvault Affected 11.46.0 – 11.46.29; 11.44.0 – 11.44.24; 11.40.0 – 11.40.77; 11.36.0 – 11.36.126 Fixed in — No fix listed CNA
  • Grid(HSX) CVFS VendorCommvault Affected 5.0.1.0 – 5.0.14.4 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:*——Commvault
  • cpe:2.3:a:commvault:commvault:*:*:*:*:*:*:*:* Versions — — ·Commvault

Remediation

No fixed version is listed for Commvault Cloud or Grid(HSX) CVFS. The source description advises customers to upgrade to a resolved maintenance release.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-77090
  2. 2026-10-13 Alias added: GHSA-g9jj-cpxw-62v5
  3. 2026-10-14 Priority changed: MEDIUM → LOW
  4. 2026-10-15 Weakness changed · CISA ADP
  5. 2026-10-15 CISA SSVC decision points changed
  6. 2026-10-15 Priority changed: LOW → MEDIUM

References

Other 1

  • TI-2025-24197 Commvault Command Center Innovation Release <= 11.38.25 Unathenticated Install Package Path Traversal KEVCVSS 4.0CRITICAL 9.3
  • TI-2025-03473 Commvault Web Server unspecified vulnerability KEVCVSS 4.0HIGH 8.7
  • TI-2021-13983 This vulnerability allows remote attackers to execute arbitrary code on affected… CVSS 3.1HIGH 8.8
  • TI-2017-13252 A Command Injection issue was discovered in ContentStore/Base/CVDataPipe.dll in Commvault… CVSS 3.0CRITICAL 9.8
  • TI-2021-13982 Unrestricted file upload in Commvault CommCell CVSS 3.1HIGH 8.8
  • TI-2025-35673 Path traversal in Commvault CommCell CVSS 4.0HIGH 8.7
See all 42 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences