Improper Neutralization of Special Elements in Output Used by a Downstream Component in GoAnywhere MFT - CVE-2026-1089
Published: June 19, 2026
Vulnerability identifier: #VU134966
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-1089
CWE-ID: CWE-74
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Fortra
Affected software:
GoAnywhere MFT
GoAnywhere MFT
Detailed vulnerability description
The vulnerability allows a remote attacker to trigger arbitrary DNS lookups and disclose sensitive information.
The vulnerability exists due to improper neutralization of special elements in output used by a downstream component in user-controlled HTTP header processing when handling requests. A remote attacker can send a specially crafted request to trigger arbitrary DNS lookups and disclose sensitive information.
The issue may also enable DNS rebinding.
How to mitigate CVE-2026-1089
Install security update from vendor's website.