# CVE-2026-97333: Commvault QAPI stack-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-97333-qapi-contained-a-stack-based-buffer-overflow-affecting-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-97333 · Severity: info · Published 2026-10-13

Commvault's data protection platform contains a stack-based buffer overflow in its QAPI component that could lead to service unavailability or outages. An attacker could exploit this vulnerability to crash critical backup and recovery infrastructure, disrupting business continuity and data protection operations. The vulnerability affects CommServe, Web Server, Command Center, and Index Server components across multiple versions.

Technologies: [Commvault](https://junglewise.ai/threats/technologies/commvault). Vendors: [Commvault](https://junglewise.ai/threats/vendors/commvault).

## Quick answers

**Is CVE-2026-97333 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-97333 being exploited in the wild.

**How severe is CVE-2026-97333?** Informational severity, published 13 October 2026.

**Which products and versions are affected?** Commvault 11.36.0 to 11.46.29.

**Is there a fix for CVE-2026-97333?** Yes: fixed in 11.36.127, 11.40.78, 11.44.25, 11.46.30 and higher. Until then: Upgrade CommServe, Web Server, Command Center and Index Server components to the resolved maintenance release or higher version. Verify updates via Command Center by navigating to Manage > Servers and confirming all servers are running the resolved maintenance release. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-97333 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-97333?** Check whether you run Commvault at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 11.36.127, 11.40.78, 11.44.25, 11.46.30 and higher

Upgrade CommServe, Web Server, Command Center and Index Server components to the resolved maintenance release or higher version. Verify updates via Command Center by navigating to Manage > Servers and confirming all servers are running the resolved maintenance release.

## Technical details

A stack-based buffer overflow exists in QAPI affecting Commvault versions 11.36.0 through 11.46.29. The vulnerability impacts service availability and requires patch installation on CommServe, Web Server, Command Center, and Index Server components. Fixed versions include 11.36.127, 11.40.78, 11.44.25, and 11.46.30 and higher.

## Affected products

- Commvault Commvault 11.36.0 to 11.46.29

## Timeline

- 2026-10-13: disclosed

## References

- [https://documentation.commvault.com/securityadvisories/CV_2026_10_4.html](https://documentation.commvault.com/securityadvisories/CV_2026_10_4.html)

## Related threats

- [Commvault network messaging layer decompression resource exhaustion](https://junglewise.ai/threats/cve-2026-97334-the-network-messaging-layer-contained-improper-handling-of-highly)
- [Commvault CVFS missing authentication in command execution](https://junglewise.ai/threats/cve-2026-77096-cvfs-contained-a-missing-authentication-condition-affecting)
- [Commvault null pointer dereference in CvFWD](https://junglewise.ai/threats/cve-2026-77095-cvfwd-contained-a-null-pointer-dereference-affecting-service)
- [Commvault CvFWD out-of-bounds write denial of service](https://junglewise.ai/threats/cve-2026-77094-cvfwd-contained-an-out-of-bounds-write-affecting-service)
- [Commvault CvFWD integer overflow denial of service](https://junglewise.ai/threats/cve-2026-77093-cvfwd-contained-an-integer-overflow-affecting-service)