CVE-2017-9800: Apache Subversion

Critical severity, CVSS 9.8. EPSS: 18.9% chance of exploitation in the next 30 days.

A maliciously constructed svn+ssh:// URL would cause Subversion clients before 1.8.19, 1.9.x before 1.9.7, and 1.10.0.x through 1.10.0-alpha3 to run an arbitrary shell command. Such a URL could be generated by a malicious server, by a malicious user committing to a honest server (to attack another user of that server's repositories), or by a proxy server. The vulnerability affects all clients, including those that use file://, http://, and plain (untunneled) svn://.

Affected products

• Apache Subversion: up to and including 1.8.18; version 1.9.0 only; version 1.9.1 only; version 1.9.2 only; version 1.9.3 only; version 1.9.4 only; …

Published 2017-08-11. Last modified 2026-06-17.