# CVE-2026-13739: Server-Side Request Forgery (SSRF)

> An unauthenticated attacker can exploit a legacy endpoint in Commvault Command Center to perform server-side request forgery, potentially accessing internal resources.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/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:** 11 Aug 2026
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-xxcx-v673-pwpr

## What is CVE-2026-13739?

CVE-2026-13739 is a high-severity server-side request forgery vulnerability in Commvault Cloud, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A legacy endpoint in Command Center contained an unauthenticated server-side request forgery (SSRF) vulnerability related to the handling of arbitrary target URLs.  Software customers upgrade to resolved maintenance release.  Update Command Center.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-13739?

It affects 1 product.


Products: Commvault Commvault.

## How do I fix CVE-2026-13739?

No fix has been published for CVE-2026-13739 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-13739 being exploited?

There is no known exploitation of CVE-2026-13739 in the wild and no public exploit code.

## Other vulnerabilities in Commvault Cloud

- [CVE-2025-34028](https://insights.sbomify.com/CVE-2025-34028/): Commvault Command Center Path Traversal (critical 9.3, exploited in the wild)
- [CVE-2025-3928](https://insights.sbomify.com/CVE-2025-3928/): Commvault Web Server Unspecified (high 8.7, exploited in the wild)
- [CVE-2017-18044](https://insights.sbomify.com/CVE-2017-18044/): Command injection in n/a (critical 9.8)
- [CVE-2026-77089](https://insights.sbomify.com/CVE-2026-77089/): Command Center API Authentication Bypass (critical 9.3)
- [CVE-2026-13737](https://insights.sbomify.com/CVE-2026-13737/): Command Restriction Bypass (critical 9.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-13739 and fix it if it is affected.

What it is: CVE-2026-13739 is a high-severity server-side request forgery vulnerability in Commvault Cloud, published on 11 Aug 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-2026-13739 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-2026-13739/ (Markdown: https://insights.sbomify.com/CVE-2026-13739/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13739
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13739
- OSV: https://osv.dev/vulnerability/CVE-2026-13739

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-13739/
Summaries are generated and may contain mistakes; the official description above is the record.