How severe is CVE-2011-3871?

No CVSS score has been assigned to CVE-2011-3871 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2011-3871?

CVE-2011-3871 affects the following packages: puppet (RubyGems), puppet (RubyGems). Ecosystems affected: RubyGems.

How do I fix CVE-2011-3871?

Update puppet to 2.7.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-3871 is resolved across your whole dependency graph.

How do I detect CVE-2011-3871 in my RubyGems dependencies?

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

How do I mitigate CVE-2011-3871 if there is no patch (or I can't update yet)?

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.

Is CVE-2011-3871 actively exploited in the wild?

No public exploit code has been indexed for CVE-2011-3871 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2011-3871?

CVE-2011-3871 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 27th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2011-3871?

CVE-2011-3871 is classified as CWE-264 (CWE-264). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2011-3871 published, and has it been updated?

CVE-2011-3871 was published on October 27, 2011 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎 RubyGems

Not in CISA KEV

CVE-2011-3871 — puppet

Fix: puppetlabs/puppet@343c7bd

CVE-2011-3871 is a CWE-264 vulnerability in puppet. A fix is available for puppet — see the affected versions and patch details below.

Puppet uses predictable filenames, allowing arbitrary file overwrite

Also known asGHSA-mpmx-gm5v-q789

Published

Oct 27, 2011

Updated

Apr 10, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs27th percentile — riskier than 27% of all scored CVEsHighest risk

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

Real-World Exposure

2 pkgs affected

💎puppet💎puppet

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

Description

Puppet 2.7.x before 2.7.5, 2.6.x before 2.6.11, and 0.25.x, when running in --edit mode, uses a predictable file name, which allows local users to run arbitrary Puppet code or trick a user into editing arbitrary files.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`puppet`	≥ 2.7.0&&< 2.7.5	2.7.5`bundle update puppet --conservative`
💎RubyGems	`puppet`	all versions	2.6.11`bundle update puppet --conservative`

Affected Products

2 products · 23 configurations

Application

puppetpuppet

21 versions

0.25.00.25.10.25.20.25.30.25.40.25.50.25.62.6.02.6.12.6.22.6.32.6.4

Application

puppetpuppetlabs

2 versions

2.7.02.7.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for puppet, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update puppet to 2.7.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-3871 is resolved across your whole dependency graph.
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

O3 Security · Impact-Aware SCA

Is CVE-2011-3871 in your dependencies?

Find it across RubyGems, including transitive dependencies.

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