CVE-2018-1000132 Mercurial Incorrect Access Control vulnerability

What is CVE-2018-1000132?

CVE-2018-1000132 is a critical missing authorization vulnerability in Debian Debian Linux, published on 14 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Mercurial version 4.5 and earlier contains a Incorrect Access Control (CWE-285) vulnerability in Protocol server that can result in Unauthorized data access. This attack appear to be exploitable via network connectivity. This vulnerability appears to have been fixed in 4.5.1.

Weakness: CWE-732

Which versions are affected by CVE-2018-1000132?

3 open source packages ship an affected version, including mercurial. It affects 2 products.

Products include Debian Debian Linux, Mercurial Mercurial.

How do I fix CVE-2018-1000132?

Upgrade mercurial to 4.5.1 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2018-1000132 being exploited?

There is no known exploitation of CVE-2018-1000132 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-2018-1000132, DEBIAN-CVE-2018-1000132, DLA-1331-1, GHSA-4mr4-7vjv-9hm6, PYSEC-2018-87, SUSE-SU-2018:0933-1 and 1 more.