CVE-2026-12862 XLSX formula injection in exports
Attackers can inject malicious formulas into Excel exports, potentially compromising the environment of administrators who open the files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-12862?
CVE-2026-12862 is a medium-severity code injection vulnerability in pretix Venueless, published on 22 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Untrusted user data was passed verbatim to Excel exports for administrators. This allowed formula injection which can be used to compromise the environment of the user loading the file or other data in the file.
Weakness: CWE-148
Which versions are affected by CVE-2026-12862?
How do I fix CVE-2026-12862?
No fix has been published for CVE-2026-12862 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-2026-12862 being exploited?
There is no known exploitation of CVE-2026-12862 in the wild and no public exploit code.