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Vulnerability details: VCID-jkk1-jx5j-q3ch
Vulnerability ID VCID-jkk1-jx5j-q3ch
Aliases CVE-2009-3086
GHSA-fg9w-g6m4-557j
Summary Exposure of Sensitive Information to an Unauthorized Actor 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
generic_textual MODERATE http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00004.html
epss 0.00556 https://api.first.org/data/v1/epss?cve=CVE-2009-3086
generic_textual MODERATE https://github.com/rails/rails
generic_textual MODERATE https://github.com/rails/rails/commit/1f07a89c5946910fc28ea5ccd1da6af8a0f972a0
generic_textual MODERATE https://github.com/rails/rails/commit/674f780d59a5a7ec0301755d43a7b277a3ad2978
generic_textual MODERATE https://github.com/rails/rails/commit/d460c9a25560f43e7c3789abadf7b455053eb686
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2009-3086.yml
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2009-3086.yml
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2009-3086
generic_textual MODERATE https://web.archive.org/web/20090906010200/http://www.vupen.com/english/advisories/2009/2544
generic_textual MODERATE https://web.archive.org/web/20090907001716/http://secunia.com/advisories/36600
generic_textual MODERATE https://web.archive.org/web/20200229150042/http://www.securityfocus.com/bid/37427
generic_textual MODERATE http://weblog.rubyonrails.org/2009/9/4/timing-weakness-in-ruby-on-rails
generic_textual MODERATE http://www.debian.org/security/2011/dsa-2260
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00004.html
https://api.first.org/data/v1/epss?cve=CVE-2009-3086
http://secunia.com/advisories/36600
https://github.com/rails/rails
https://github.com/rails/rails/commit/1f07a89c5946910fc28ea5ccd1da6af8a0f972a0
https://github.com/rails/rails/commit/674f780d59a5a7ec0301755d43a7b277a3ad2978
https://github.com/rails/rails/commit/d460c9a25560f43e7c3789abadf7b455053eb686
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2009-3086.yml
https://web.archive.org/web/20090906010200/http://www.vupen.com/english/advisories/2009/2544
https://web.archive.org/web/20090907001716/http://secunia.com/advisories/36600
https://web.archive.org/web/20200229150042/http://www.securityfocus.com/bid/37427
http://weblog.rubyonrails.org/2009/9/4/timing-weakness-in-ruby-on-rails
http://www.debian.org/security/2011/dsa-2260
http://www.securityfocus.com/bid/37427
http://www.vupen.com/english/advisories/2009/2544
545063 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=545063
CVE-2009-3086 https://nvd.nist.gov/vuln/detail/CVE-2009-3086
CVE-2009-3086.YML https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2009-3086.yml
GHSA-fg9w-g6m4-557j https://github.com/advisories/GHSA-fg9w-g6m4-557j
GLSA-200912-02 https://security.gentoo.org/glsa/200912-02
No exploits are available.
Exploit Prediction Scoring System (EPSS)
Percentile 0.68518
EPSS Score 0.00556
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:37:13.881320+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/gem/rails/CVE-2009-3086.yml 38.6.0