CVE-2026-8931 Critical RCE vulnerability in Disig Web Signer
Attackers can execute arbitrary code remotely on Disig Web Signer installations, posing a critical security risk to users.
- 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-2026-8931?
CVE-2026-8931 is a critical code injection vulnerability in Disig Web Signer, published on 1 Jun 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
A critical Remote Code Execution (RCE) vulnerability exists in Disig Web Signer versions 2.0.3 through 2.5.3.
Weakness: CWE-94
Which versions are affected by CVE-2026-8931?
How do I fix CVE-2026-8931?
No fix has been published for CVE-2026-8931 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-2026-8931 being exploited?
There is no known exploitation of CVE-2026-8931 in the wild and no public exploit code.
Sources
Also known as GHSA-vcv9-hx6w-934w.