# CVE-2026-97334: Commvault network messaging layer decompression resource exhaustion

Source: https://junglewise.ai/threats/cve-2026-97334-the-network-messaging-layer-contained-improper-handling-of-highly  
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-2026-97334 · Severity: info · Published 2026-10-13

Commvault's backup and disaster recovery software contains a flaw in how it processes highly compressed network messages that can cause service disruption. An attacker with network access could send specially crafted compressed data to crash or degrade the availability of critical backup infrastructure including the CommServe server and associated components, potentially preventing backup and recovery operations.

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

## Quick answers

**Is CVE-2026-97334 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-97334 being exploited in the wild.

**How severe is CVE-2026-97334?** Informational severity, published 13 October 2026.

**Which products and versions are affected?** Commvault 11.46.0-11.46.29, 11.44.0-11.44.24, 11.40.0-11.40.77, 11.36.0-11.36.126.

**Is there a fix for CVE-2026-97334?** Yes: fixed in Commvault 11.46.30 and higher, 11.44.25 and higher, 11.40.78 and higher, 11.36.127 and higher. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-97334 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-97334?** 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 Commvault 11.46.30 and higher, 11.44.25 and higher, 11.40.78 and higher, 11.36.127 and higher

## Technical details

The vulnerability is a resource exhaustion flaw in the network messaging layer's decompression handling, triggered by improper processing of highly compressed data. It is exploitable over the network without requiring authentication or user interaction, affecting all Commvault components (CommServe, Web Server, Command Center, MediaAgents, clients, and HyperScale). A fix is available in patched maintenance releases across all affected version branches.

## Affected products

- Commvault Commvault 11.46.0-11.46.29, 11.44.0-11.44.24, 11.40.0-11.40.77, 11.36.0-11.36.126

## Timeline

- 2026-10-13: disclosed

## References

- [https://documentation.commvault.com/securityadvisories/CV_2026_10_3.html](https://documentation.commvault.com/securityadvisories/CV_2026_10_3.html)

## Related threats

- [Commvault QAPI stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-97333-qapi-contained-a-stack-based-buffer-overflow-affecting-service)
- [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)