CVE-2026-107732 SumatraPDF: Markup/command-link injection into UI notification text
Attackers can execute arbitrary local programs by injecting malicious markup into PDF link targets or document paths in SumatraPDF notifications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-107732?
CVE-2026-107732 is a high-severity code injection vulnerability in sumatrapdfreader sumatrapdf, published on 8 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, untrusted document paths and PDF link targets are interpolated into notification text that ParseTip() interprets as trusted tip markup. When a user clicks an injected link, ExecuteTipLink() dispatches its CmdExec command and can execute an attacker-selected local program in the user's context. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.
Weakness: CWE-94
Which versions are affected by CVE-2026-107732?
How do I fix CVE-2026-107732?
No fix has been published for CVE-2026-107732 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-2026-107732 being exploited?
There is no known exploitation of CVE-2026-107732 in the wild and no public exploit code.
Sources
Also known as GHSA-2wv2-qm2f-vmxh.