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Medium · 6.9 CVE-2026-41253 EUVD-2026-23656GHSA-5pgv-4jf4-9r43

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 …

Published Apr 18, 2026 · Updated Apr 20, 2026 · Assigned by mitre

Description

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

VendorProductAffectedFixed
iTerm2 iTerm2 ≤ 3.6.9 —

References