How severe is CVE-2014-3916?

CVE-2014-3916 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2014-3916 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-3916?

CVE-2014-3916 primarily affects Rubyonrails Rails. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-3916?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-3916 published?

CVE-2014-3916 was published on 2014-11-16 and last updated on 2026-06-17.

CVE-2014-3916

CVE-2014-3916 is a medium-severity vulnerability in Rubyonrails Rails with a CVSS 2.0 base score of 5.0. 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-19.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-19
Affected product: Rubyonrails Rails
Published: 2014-11-16
Last modified: 2026-06-17

Description

The str_buf_cat function in string.c in Ruby 1.9.3, 2.0.0, and 2.1 allows context-dependent attackers to cause a denial of service (segmentation fault and crash) via a long string.

Frequently asked questions

What is CVE-2014-3916?: The str_buf_cat function in string.c in Ruby 1.9.3, 2.0.0, and 2.1 allows context-dependent attackers to cause a denial of service (segmentation fault and crash) via a long string.
How severe is CVE-2014-3916?: CVE-2014-3916 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2014-3916 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-3916?: CVE-2014-3916 primarily affects Rubyonrails Rails. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-3916?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-3916 published?: CVE-2014-3916 was published on 2014-11-16 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:rubyonrails:rails:1.9.3:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:2.1.0:*:*:*:*:*:*:*

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