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CVE-2009-3086

actionpack and activesupport vulnerable to information leaks

5.0 MediumFix available

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.

Exploit likelihood

2.23%Up 0.9 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

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.

Record
CVE-2009-3086
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-200
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2009-3086
Updated
2026-11-02
EUVDEUVD-2017-0227 No score

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.

Record
EUVD-2017-0227
Updated
2026-11-03
GitHub AdvisoriesGHSA-fg9w-g6m4-557j No score

actionpack and activesupport vulnerable to information leaks

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.

Record
GHSA-fg9w-g6m4-557j
Weakness
CWE-200
Updated
2026-11-02
OSV No score

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.

Record
CVE-2009-3086
Updated
2026-11-02
OSVDEBIAN-CVE-2009-3086 No score

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.

Record
DEBIAN-CVE-2009-3086
Updated
2026-11-02
OSVGHSA-fg9w-g6m4-557j No score

actionpack and activesupport vulnerable to information leaks

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.

Record
GHSA-fg9w-g6m4-557j
Weakness
CWE-200
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
actionpack
RubyGems
2.1.0 up to 2.2.3
2.2.3
activesupport
RubyGems
2.3.0 up to 2.3.4
2.3.4
actionpack
RubyGems
2.3.0 up to 2.3.4
2.3.4
activesupport
RubyGems
2.1.0 up to 2.2.3
2.2.3
rails
Debian:12
before 2.2.3-1
2.2.3-1
rails
Debian:13
before 2.2.3-1
2.2.3-1
rails
Debian:14
before 2.2.3-1
2.2.3-1
rails
Debian:5.0
From an advisory covering 2 CVEs
before 2.1.0-7+lenny0.2, plus listed versions
2.1.0-62.1.0-72.1.0-7+lenny0.1
2.1.0-7+lenny0.2
actionpack
RubyGems
2.1.0 up to 2.2.3, plus listed versions
2.1.12.1.22.2.2
2.2.3
actionpack
RubyGems
2.3.0 up to 2.3.4, plus listed versions
2.3.22.3.3
2.3.4
activesupport
RubyGems
2.1.0 up to 2.2.3, plus listed versions
2.1.12.1.22.2.2
2.2.3
activesupport
RubyGems
2.3.0 up to 2.3.4, plus listed versions
2.3.22.3.3
2.3.4

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-3086 is a medium vulnerability (CVSS 5.0) in Rubyonrails Rails, published September 8, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.23%, the 82nd percentile. Fixed in actionpack 2.2.3.

References

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