How severe is CVE-2009-5147?

CVE-2009-5147 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2009-5147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-5147?

CVE-2009-5147 primarily affects Ruby-lang Ruby. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-5147?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-5147 published?

CVE-2009-5147 was published on 2017-03-29 and last updated on 2026-06-16.

CVE-2009-5147

CVE-2009-5147 is a high-severity vulnerability in Ruby-lang Ruby with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Ruby-lang Ruby
Published: 2017-03-29
Last modified: 2026-06-16

Description

DL::dlopen in Ruby 1.8, 1.9.0, 1.9.2, 1.9.3, 2.0.0 before patchlevel 648, and 2.1 before 2.1.8 opens libraries with tainted names.

Frequently asked questions

What is CVE-2009-5147?: DL::dlopen in Ruby 1.8, 1.9.0, 1.9.2, 1.9.3, 2.0.0 before patchlevel 648, and 2.1 before 2.1.8 opens libraries with tainted names.
How severe is CVE-2009-5147?: CVE-2009-5147 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2009-5147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-5147?: CVE-2009-5147 primarily affects Ruby-lang Ruby. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-5147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-5147 published?: CVE-2009-5147 was published on 2017-03-29 and last updated on 2026-06-16.

References

Affected products (23)

cpe:2.3:a:ruby-lang:ruby:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:1.9.2:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:1.9.3:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p195:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p247:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p353:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p481:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p576:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p594:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p598:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p643:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p645:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.0.0:p647:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.4:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.5:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.6:*:*:*:*:*:*:*
cpe:2.3:a:ruby-lang:ruby:2.1.7:*:*:*:*:*:*:*

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