# CVE-2026-1089: User‑Controlled HTTP Header In Fortra's GoAnywhere MFT Allows Arbitrary DNS Lookups

> Attackers can trigger arbitrary DNS lookups and information disclosure via user-controlled HTTP headers in Fortra GoAnywhere MFT.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 21 Apr 2026
- **Also known as:** GHSA-6x5f-r479-qh4p

## What is CVE-2026-1089?

CVE-2026-1089 is a medium-severity server-side request forgery vulnerability in Fortra GoAnywhere MFT, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

User‑Controlled HTTP Header in Fortra's GoAnywhere MFT prior to version 7.10.0 allows attackers to trigger a DNS lookup, as well as DNS Rebinding and Information Disclosure.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-1089?

It affects 1 product.


Products: Fortra Goanywhere Managed File Transfer.

## How do I fix CVE-2026-1089?

No fix has been published for CVE-2026-1089 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1089 being exploited?

There is no known exploitation of CVE-2026-1089 in the wild and no public exploit code.

## Other vulnerabilities in Fortra GoAnywhere MFT

- [CVE-2025-10035](https://insights.sbomify.com/CVE-2025-10035/): Fortra GoAnywhere MFT Deserialization of Untrusted Data (critical 10.0, exploited in the wild)
- [CVE-2023-0669](https://insights.sbomify.com/CVE-2023-0669/): Fortra GoAnywhere MFT Remote Code Execution (high 7.2, exploited in the wild)
- [CVE-2024-0204](https://insights.sbomify.com/CVE-2024-0204/): Authentication Bypass in GoAnywhere MFT (critical 9.8)
- [CVE-2025-14362](https://insights.sbomify.com/CVE-2025-14362/): GoAnywhere MFT SFTP Service Login Vulnerable to Brute Force Attack Under Certain Circumstances (high 7.3)
- [CVE-2024-25157](https://insights.sbomify.com/CVE-2024-25157/): Authentication bypass in GoAnywhere MFT prior to 7.6.0 (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1089 and fix it if it is affected.

What it is: CVE-2026-1089 is a medium-severity server-side request forgery vulnerability in Fortra GoAnywhere MFT, published on 21 Apr 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-2026-1089 in the wild and no public exploit code.

Affected product: Fortra GoAnywhere MFT. 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-2026-1089/ (Markdown: https://insights.sbomify.com/CVE-2026-1089/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1089
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1089
- OSV: https://osv.dev/vulnerability/CVE-2026-1089

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1089/
Summaries are generated and may contain mistakes; the official description above is the record.