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CRITICAL severity

CVE-2014-9706 — dulwich

CRITICALFix: jelmer/dulwich@091638b

CVE-2014-9706 is a critical-severity (CVSS 9.8) CWE-19 vulnerability in dulwich. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for dulwich — see the affected versions and patch details below.

Dulwich Arbitrary code execution via commit with directory path starting with .git

Also known asGHSA-4j5j-58j7-6c3wPYSEC-2015-34
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
2 known
Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
5.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs92th percentile — riskier than 92% of all scored CVEsHighest risk
2.08%3.29%4.50%5.71%2.8%5.0%May 26Aug 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
🐍dulwich

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 build_index_from_tree function in index.py in Dulwich versions 0.9.9 and below allows remote attackers to execute arbitrary code via a commit with a directory path starting with .git/, which is not properly handled when checking out a working tree.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIdulwichall versions0.9.10pip install --upgrade 'dulwich==0.9.10'

Affected Products

2 products · 2 configurations
OS
debian linuxdebian
1 version
7.0
Application
dulwichdulwich_project
≤ 0.9.8
range
Exploits & PoCs
2

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

The build_index_from_tree function in index.py in Dulwich before 0.9.9 a…

openwall.comNVDApr 2015

Report on lists.launchpad.net

lists.launchpad.netNVDApr 2015

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update dulwich to 0.9.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2014-9706 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 `build_index_from_tree` function in index.py in Dulwich versions 0.9.9 and below allows remote attackers to execute arbitrary code via a commit with a directory path starting with `.git/`, which is not properly handled when checking out a working tree.
O3 Security · Impact-Aware SCA

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CVE-2014-9706: dulwich RCE — Fixed in 0.9.10