Notes Station 3 OS Command Injection (CVE-2026-34007) fixed in 3.9.11
CVE-2026-34007 Published on October 15, 2026
**RCE** Unsanitized `X-Forwarded-For` header passed to `shell_exec()` via broken IP validation fallback in `getClientIP()`
An OS command injection vulnerability has been reported to affect Notes Station 3. If exploited, the vulnerability could allow remote attackers to execute arbitrary commands.
We have already fixed the vulnerability in the following version:
Notes Station 3 3.9.11 and later
Vulnerability Analysis
CVE-2026-34007 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2026-34007 has been classified to as a Shell injection vulnerability or weakness.
Products Associated with CVE-2026-34007
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Affected Versions
QNAP Systems Inc. Notes Station 3:- Version 3.9.x and below 3.9.11 is affected.