CVE-2026-41073 RT: Spreadsheet downloads vulnerable to CSV/formula injection in Microsoft Excel and similar apps
Attackers can inject malicious formulas into RT spreadsheet exports, leading to code execution when victims open the files in spreadsheet applications.
- 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
- Available
What is CVE-2026-41073?
CVE-2026-41073 is a medium-severity vulnerability in bestpractical rt, published on 22 May 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
RT is an open source, enterprise-grade issue and ticket tracking system. Versions prior to 5.0.10 and 6.0.0 through 6.0.2 contain a spreadsheet (CSV/formula) injection vulnerability. User-controlled data in spreadsheet exports is not sanitized before being written to the output file, which can cause spreadsheet applications to interpret crafted values as formulas or macros when the file is opened. This issue has been fixed in versions 5.0.10 and 6.0.3. If developers are unable to upgrade immediately, they can temporarily work around this issue by avoiding opening exported RT spreadsheet files directly in spreadsheet applications when the data may contain untrusted user input.
Weakness: CWE-1236
Which versions are affected by CVE-2026-41073?
How do I fix CVE-2026-41073?
Upgrade to a fixed version.
Is CVE-2026-41073 being exploited?
There is no known exploitation of CVE-2026-41073 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-41073, GHSA-6x92-7v65-7m3r, UBUNTU-CVE-2026-41073.