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🐍 PyPI
Not in CISA KEV
CRITICAL severity

Mercurial vulnerable to arbitrary command execution via a crafted repository name in a clone commandGHSA-3pmw-h7j4-rf54

CRITICAL

GHSA-3pmw-h7j4-rf54 is a critical-severity (CVSS 9.8) Improper Input Validation vulnerability in mercurial. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for mercurial — see the affected versions and patch details below.

Also known asCVE-2014-9462PYSEC-2015-14
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
4.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs91th percentile — riskier than 91% of all scored CVEsHighest risk
0.21%1.85%3.48%5.12%1.1%4.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍mercurial

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

The _validaterepo function in sshpeer in Mercurial before 3.2.4 allows remote attackers to execute arbitrary commands via a crafted repository name in a clone command.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPImercurialall versions3.2.4pip install --upgrade 'mercurial==3.2.4'

Affected Products

2 products · 3 configurations
Application
mercurialmercurial
≤ 3.2.3
range
OS
opensuseopensuse
2 versions
13.113.2
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The _validaterepo function in sshpeer in Mercurial before 3.2.4 allows r…

chargen.matasano.comNVDOct 2018

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mercurial, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update mercurial to 3.2.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3pmw-h7j4-rf54 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

The _validaterepo function in sshpeer in Mercurial before 3.2.4 allows remote attackers to execute arbitrary commands via a crafted repository name in a clone command.
O3 Security · Impact-Aware SCA

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Mercurial vulnerable to arbitrary command execution via a…