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CVE

CVE-2019-3902

A flaw was found in Mercurial before 4.9. It was possible to use symlinks and subrepositories to defeat Mercurial's path

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.

MEDIUM · CVSS 5.1 EPSS 0.00541
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-59Improper Link Resolution Before File Access ('Link Following')
▤

Affected Products & Versions

3
mercurial< 4.9
debian linuxall versions
redhat enterprise linuxall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI mercurial MODERATE fixed in 4.9
▣

Scoring & Timeline

5.1
MEDIUM · CVSS v3.0 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Apr 2019 · 04:29 PM
CVSS VectorCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

9
suse-csafopenSUSE-SU-2024:10586-1
usnUSN-5102-1
usnUSN-5102-2
suse-csafSUSE-SU-2020:3003-1
suse-csafSUSE-SU-2020:1709-2
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3902Issue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00024.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html
https://usn.ubuntu.com/4086-1/
https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.9_.282019-02-01.29Third Party Advisory
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