CVE-2026-41253

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.

CVSS v3 6.9 MEDIUM

6.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.4 / Impact : 5.5

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://blog.calif.io/p/mad-bugs-even-cat-readmetxt-is-not	Exploit Third Party Advisory
https://github.com/gnachman/iTerm2/commit/a9e745993c2e2cbb30b884a16617cd5495899f86	Patch
https://iterm2.com/downloads.html	Product
https://news.ycombinator.com/item?id=47809190	Issue Tracking

Configurations

Configuration 1 (hide)

cpe:2.3:a:iterm2:iterm2:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-18 06:16

Updated : 2026-06-17 10:46

NVD link : CVE-2026-41253

Mitre link : CVE-2026-41253

CVE.ORG link : CVE-2026-41253

JSON object : View

Products Affected

iterm2

iterm2

CWE

CWE-829

Inclusion of Functionality from Untrusted Control Sphere

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