# CVE-2026-97334: Network messaging layer decompression resource exhaustion

> Attackers can cause service unavailability by sending highly compressed data to the network messaging layer, requiring an upgrade to the resolved maintenance release.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-6f78-rvx4-53fm

## What is CVE-2026-97334?

CVE-2026-97334 is a high-severity denial of service vulnerability in Commvault Cloud, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The network messaging layer contained improper handling of highly compressed data affecting service availability.  Software customers upgrade to resolved maintenance release. Update all Commvault installations, including CommServe server, Web Server, Command Center, MediaAgents, clients, and HyperScale.

Weakness: CWE-409 (Improper Handling of Highly Compressed Data (Data Amplification))

## Which versions are affected by CVE-2026-97334?


## How do I fix CVE-2026-97334?

No fix has been published for CVE-2026-97334 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-97334 being exploited?

There is no known exploitation of CVE-2026-97334 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-97334 and fix it if it is affected.

What it is: CVE-2026-97334 is a high-severity denial of service vulnerability in Commvault Cloud, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-97334 in the wild and no public exploit code.

Affected product: Commvault Cloud. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-97334/ (Markdown: https://insights.sbomify.com/CVE-2026-97334/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-97334
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-97334
- OSV: https://osv.dev/vulnerability/CVE-2026-97334

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-97334/
Summaries are generated and may contain mistakes; the official description above is the record.