CVE-2017-1000115 Mercurial missing symlink check

What is CVE-2017-1000115?

CVE-2017-1000115 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 4 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Mercurial prior to version 4.3 is vulnerable to a missing symlink check that can malicious repositories to modify files outside the repository

Weakness: CWE-59

Which versions are affected by CVE-2017-1000115?

3 open source packages ship an affected version, including mercurial. It affects 8 products.

Products include Debian Debian Linux, Mercurial Mercurial, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus and 2 more.

How do I fix CVE-2017-1000115?

Upgrade mercurial to a fixed version for your release line: 4.3 or 4.3.1.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2017-1000115 being exploited?

There is no known exploitation of CVE-2017-1000115 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2017-1000115, DEBIAN-CVE-2017-1000115, GHSA-hvr9-wr9p-grgr, PYSEC-2017-88, UBUNTU-CVE-2017-1000115.