What is CVE-2023-46300?

CVE-2023-46300 is a critical-severity vulnerability in Iterm2, classified under Improper Encoding or Escaping of Output. CVSS score: 9.8/10. Published 2023-10-22.

How severe is CVE-2023-46300?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Iterm2

CVE-2023-46300

iTerm2 before 3.4.20 allow (potentially remote) code execution because of mishandling of certain escape sequences related to tmux integration.

Published 2023-10-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: -0.000

Affected products

Iterm2

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

github.com/gnachman/iTerm2/commit/ae8192522661c34d1cbe57f6f9ef2ff0a337c2a5 (Patch)
github.com/gnachman/iTerm2/commit/b2268b03b5f3d4cd8ca275eaef5d16d0fac20009 (Patch)
blog.solidsnail.com/posts/2023-08-28-iterm2-rce (Exploit, Third Party Advisory)
iterm2.com/news.html (Release Notes)

Frequently asked questions

What is CVE-2023-46300?: CVE-2023-46300 is a critical-severity vulnerability in Iterm2, classified under Improper Encoding or Escaping of Output. CVSS score: 9.8/10. Published 2023-10-22.
How severe is CVE-2023-46300?: Critical severity. CVSS v3 base score is 9.8 out of 10.