CVE-2017-9462: Debian Linux

High severity, CVSS 8.8. EPSS: 21.7% chance of exploitation in the next 30 days.

In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch the Python debugger, and consequently execute arbitrary code, by using --debugger as a repository name.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only
• Mercurial Mercurial: before 4.1.3 (fixed in 4.1.3)
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.3 only; version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 7.3 only; version 7.6 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only

Published 2017-06-06. Last modified 2026-06-17.