Is CVE-2012-6109 in the CISA KEV catalog?

No. CVE-2012-6109 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-6109?

CVE-2012-6109 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2012-6109?

CVE-2012-6109 has an EPSS score of 2.72% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-6109?

Upgrade ruby-rack on debian 11 to 1.4.1-2.1 or later.

CVE & CISA-KEV Catalog

CVE-2012-6109

MEDIUMEPSS 84th pctl

4.3

CVSS v2

NVD

Description

lib/rack/multipart.rb in Rack before 1.1.4, 1.2.x before 1.2.6, 1.3.x before 1.3.7, and 1.4.x before 1.4.2 uses an incorrect regular expression, which allows remote attackers to cause a denial of service (infinite loop) via a crafted Content-Disposion header.

How to fix

Remediation Available

ruby-rackDebian

Fixed in:1.4.1-2.1CVE-2012-6109

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.72%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Other references7

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.