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.
- Score
- CVSS 3.1 7.8 High
- Status
- Analyzed - cve@mitre.org
- Published
- 2026-04-18
- Last modified
- 2026-04-20
- Weaknesses
- CWE-829
Affected products
References
- https://blog.calif.io/p/mad-bugs-even-cat-readmetxt-is-not
- https://github.com/gnachman/iTerm2/commit/a9e745993c2e2cbb30b884a16617cd5495899f86
- https://iterm2.com/downloads.html
- https://news.ycombinator.com/item?id=47809190
