CVE-2026-18397 SConnect: Native Host Unauthenticated Remote Code Execution Vulnerability
Unauthenticated attackers can execute arbitrary code on victim machines via the SConnect native host messaging interface.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18397?
CVE-2026-18397 is a critical code injection vulnerability in Thales SConnect, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
This vulnerability enables unauthenticated remote code execution (RCE) on a victim's machine by exploiting a combination of cryptographic weaknesses and memory management issues in the SConnect native host component.
The attack leverages an unrestricted messaging interface between an attacker-controlled web page and the native host, allowing malicious input to bypass security checks.
Which versions are affected by CVE-2026-18397?
How do I fix CVE-2026-18397?
No fix has been published for CVE-2026-18397 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-18397 being exploited?
There is no known exploitation of CVE-2026-18397 in the wild and no public exploit code.
Sources
Also known as GHSA-cq27-3937-pqqv.