Is CVE-2009-3086 in the CISA KEV catalog?

No. CVE-2009-3086 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-3086?

CVE-2009-3086 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2009-3086?

CVE-2009-3086 has an EPSS score of 2.23% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-3086?

Upgrade rails on debian 11 to 2.2.3-1 or later.

CVE & CISA-KEV Catalog

CVE-2009-3086

MEDIUMEPSS 81th pctl

5.0

CVSS v2

NVD

Description

A certain algorithm in Ruby on Rails 2.1.0 through 2.2.2, and 2.3.x before 2.3.4, leaks information about the complexity of message-digest signature verification in the cookie store, which might allow remote attackers to forge a digest via multiple attempts.

CWE-200Information Exposure

How to fix

Remediation Available

railsDebian

Fixed in:2.2.3-1CVE-2009-3086

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

2.23%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Patch1

weblog.rubyonrails.org

Vendor Advisory1

vupen.com

Other references4

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

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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 2026-04-23.