PYSEC-2019-188

    Dashboard / Vulnerabilities / PYSEC-2019-188

    PYSEC-2019-188

    Published: 22 Apr 2019Last Modified: 10 Jun 2026

    Summary:

    Details: A flaw was found in Mercurial before 4.9. It was possible to use symlinks and subrepositories to defeat Mercurial's path-checking logic and write files outside a repository.

    References: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3902, https://lists.debian.org/debian-lts-announce/2019/04/msg00024.html, https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.9_.282019-02-01.29, https://usn.ubuntu.com/4086-1/, https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html, https://github.com/advisories/GHSA-mq66-vcfc-8246

    Affected packages

    Package

    Name: mercurial

    Purl: pkg:pypi/mercurial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.9

    Affected versions

    0.8.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High