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Vulnerability record · CVE-2019-9535 · published 9 October 2019

CVE-2019-9535: Iterm2 injection vulnerability

Iterm2 · Iterm2

A vulnerability exists in the way that iTerm2 integrates with tmux's control mode, which may allow an attacker to execute arbitrary commands by providing malicious output to the terminal. This affects versions of iTerm2 up to and including 3.3.5. This vulnerability may allow an attacker to execute arbitrary commands on their victim's computer by providing malicious output to the terminal. It could be exploited using command-line utilities that print attacker-controlled content.

9.8 CVSS 3.1 Critical EPSS 2.5% · top 16.2% CWE-349 · CWE-349CWE-74 · Injection
9.8CVSS 3.1 base score, v2 10.0
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability exists in the way that iTerm2 integrates with tmux's control mode, which may allow an attacker to execute arbitrary commands by providing malicious output to the terminal. This affects versions of iTerm2 up to and including 3.3.5. This vulnerability may allow an attacker to execute arbitrary commands on their victim's computer by providing malicious output to the terminal. It could be exploited using command-line utilities that print attacker-controlled content.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.mozilla.org/security/2019/10/09/iterm2-critical-issue-moss-audit/ ExploitThird Party Advisory
https://groups.google.com/forum/#%21topic/iterm2-discuss/57k_AuLdQa4
https://kb.cert.org/vuls/id/763073/ Third Party AdvisoryUS Government Resource
https://blog.mozilla.org/security/2019/10/09/iterm2-critical-issue-moss-audit/ ExploitThird Party Advisory
https://groups.google.com/forum/#%21topic/iterm2-discuss/57k_AuLdQa4
https://kb.cert.org/vuls/id/763073/ Third Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-38396Iterm2 code injection vulnerabilityAn issue was discovered in iTerm2 3.5.x before 3.5.2. Unfiltered use of an escape sequence to report a window title, in combination with the built-in…EPSS 1.7%9.8CVE-2024-38395Iterm2 code injection vulnerabilityIn iTerm2 before 3.5.2, the "Terminal may report window title" setting is not honored, and thus remote code execution might occur but "is not trivial…EPSS 1.5%9.8CVE-2023-46321Iterm2 vulnerabilityiTermSessionLauncher.m in iTerm2 before 3.5.0beta12 does not sanitize paths in x-man-page URLs. They may have shell metacharacters for a /usr/bin/man…EPSS 0.66%9.8CVE-2023-46322Iterm2 vulnerabilityiTermSessionLauncher.m in iTerm2 before 3.5.0beta12 does not sanitize ssh hostnames in URLs. The hostname's initial character may be non-alphanumeric…EPSS 0.66%9.8CVE-2023-46300Iterm2 vulnerabilityiTerm2 before 3.4.20 allow (potentially remote) code execution because of mishandling of certain escape sequences related to tmux integration.EPSS 1.2%9.8CVE-2023-46301Iterm2 vulnerabilityiTerm2 before 3.4.20 allow (potentially remote) code execution because of mishandling of certain escape sequences related to upload.EPSS 1.2%9.8CVE-2022-45872Iterm2 improper input validation vulnerabilityiTerm2 before 3.4.18 mishandles a DECRQSS response.EPSS 0.94%9.3CVE-2025-22275Iterm2 sensitive information in log file vulnerabilityiTerm2 3.5.6 through 3.5.10 before 3.5.11 sometimes allows remote attackers to obtain sensitive information from terminal commands by reading the /tm…EPSS 0.51%

Source: NIST National Vulnerability Database (record CVE-2019-9535), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.