CVE-2026-41253: ITERM2

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In iTerm2 through 3.6.9, displaying a .txt file can cause code execution via DCS 2000p and OSC 135 data, if the working directory contains a malicious file whose name is valid output from the conductor encoding path, such as a pathname with an initial ace/c+ substring, aka "hypothetical in-band signaling abuse." This occurs because iTerm2 accepts the SSH conductor protocol from terminal output that does not originate from a legitimate conductor session.

Affected products

• ITERM2 ITERM2: up to and including 3.6.9

Published 2026-04-18. Last modified 2026-06-17.