CVE-2026-21575: Code Injection
This High severity RCE (Remote Code Execution) vulnerability was introduced in version 3.4.11 of Sourcetree for Mac and Sourcetree for Windows. This RCE (Remote Code Execution) vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to execute arbitrary code which has high impact to confidentiality, high impact to integrity, high impact to availability, and requires user interaction. Atlassian recommends that Sourcetree for Mac and Sourcetree for Windows customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Sourcetree for Mac and Sourcetree for Windows 3.4: Upgrade to a release greater than or equal to 3.4.13 See the release notes (https://www.sourcetreeapp.com/download-archives). You can download the latest version of Sourcetree for Mac and Sourcetree for Windows from the download center (https://www.sourcetreeapp.com/download-archives). This vulnerability was reported via our Bug Bounty program.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Sourcetree for Mac and Sourcetree for Windowsto a version that resolves this vulnerability.Fixed in 3.4.13
Event History
Frequently Asked Questions
What is the severity of CVE-2026-21575?
CVE-2026-21575 has a high severity rating of 7.1.
How do I fix CVE-2026-21575?
To fix CVE-2026-21575, upgrade to the latest version of Atlassian Sourcetree for Mac or Windows.
What type of vulnerability is CVE-2026-21575?
CVE-2026-21575 is a Remote Code Execution (RCE) vulnerability.
What versions are affected by CVE-2026-21575?
CVE-2026-21575 affects version 3.4.11 and earlier of Sourcetree for both Mac and Windows.
Can CVE-2026-21575 be exploited remotely?
Yes, CVE-2026-21575 can be exploited remotely by an authenticated attacker.