CVE-2026-41253 MEDIUM

CVE-2026-41253

Vendor Iterm2
Product iTerm2
Weakness CWE-829 · Inclusion from untrusted sphere
Published April 18, 2026
Last update April 20, 2026

CVSS base score

6.9/10
Attack vector Local
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 18, 2026 CVE published
April 20, 2026 Record updated