CVE-2009-3086
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.
Exploit likelihood
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 Medium
AV: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
| Package | Affected | Fixed |
|---|---|---|
actionpackRubyGems |
2.1.0 up to 2.2.3 | 2.2.3 |
activesupportRubyGems |
2.3.0 up to 2.3.4 | 2.3.4 |
actionpackRubyGems |
2.3.0 up to 2.3.4 | 2.3.4 |
activesupportRubyGems |
2.1.0 up to 2.2.3 | 2.2.3 |
railsDebian:12 |
before 2.2.3-1 | 2.2.3-1 |
railsDebian:13 |
before 2.2.3-1 | 2.2.3-1 |
railsDebian:14 |
before 2.2.3-1 | 2.2.3-1 |
railsDebian: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 |
actionpackRubyGems |
2.1.0 up to 2.2.3, plus listed versions 2.1.12.1.22.2.2 |
2.2.3 |
actionpackRubyGems |
2.3.0 up to 2.3.4, plus listed versions 2.3.22.3.3 |
2.3.4 |
activesupportRubyGems |
2.1.0 up to 2.2.3, plus listed versions 2.1.12.1.22.2.2 |
2.2.3 |
activesupportRubyGems |
2.3.0 up to 2.3.4, plus listed versions 2.3.22.3.3 |
2.3.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE 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
secunia.com/advisories/36600
securityfocus.com/bid/37427
vupen.com/english/advisories/2009/2544
debian.org/security/2011/dsa-2260
weblog.rubyonrails.org/2009/9/4/timing-weakness-in-ruby-on-rails
lists.opensuse.org/opensuse-security-announce/2009-10/msg00004.html
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nvd.nist.gov/vuln/detail/CVE-2009-3086
github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2009-3086.yml
github.com/rails/rails/commit/1f07a89c5946910fc28ea5ccd1da6af8a0f972a0
github.com/rails/rails/commit/674f780d59a5a7ec0301755d43a7b277a3ad2978
github.com/rails/rails/commit/d460c9a25560f43e7c3789abadf7b455053eb686
web.archive.org/web/20090906010200/http://www.vupen.com/english/advisories/2009/2544
web.archive.org/web/20090907001716/http://secunia.com/advisories/36600
web.archive.org/web/20200229150042/http://www.securityfocus.com/bid/37427
github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2009-3086.yml
github.com/advisories/GHSA-fg9w-g6m4-557j
security-tracker.debian.org/tracker/CVE-2009-3086
github.com/rails/rails