CVE-2015-3226

CVE-2015-3226 is a medium-severity vulnerability in Rubyonrails Rails with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.3)
• EPSS exploit prediction: 3% (85th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-79
• Affected product: Rubyonrails Rails
• Published: 2015-07-26
• Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in json/encoding.rb in Active Support in Ruby on Rails 3.x and 4.1.x before 4.1.11 and 4.2.x before 4.2.2 allows remote attackers to inject arbitrary web script or HTML via a crafted Hash that is mishandled during JSON encoding.

Frequently asked questions

What is CVE-2015-3226?

Cross-site scripting (XSS) vulnerability in json/encoding.rb in Active Support in Ruby on Rails 3.x and 4.1.x before 4.1.11 and 4.2.x before 4.2.2 allows remote attackers to inject arbitrary web script or HTML via a crafted Hash that is mishandled during JSON encoding.

How severe is CVE-2015-3226?

CVE-2015-3226 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-3226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3226?

CVE-2015-3226 primarily affects Rubyonrails Rails. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-3226?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-3226 published?

CVE-2015-3226 was published on 2015-07-26 and last updated on 2026-06-17.

References

• http://openwall.com/lists/oss-security/2015/06/16/17
• http://www.debian.org/security/2016/dsa-3464
• http://www.securityfocus.com/bid/75231
• http://www.securitytracker.com/id/1033755
• https://groups.google.com/forum/message/raw?msg=rubyonrails-security/7VlB_pck3hU/3QZrGIaQW6cJ

Affected products (31)

• cpe:2.3:a:rubyonrails:rails:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.7:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.8:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.9:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.10:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.11:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.12:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.13:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.15:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.16:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:3.2.17:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:rails:4.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:rubyonrails:ruby_on_rails:3.2.14:*:*:*:*:*:*:*

More vulnerabilities in Rubyonrails Rails

• CVE-2013-0277 — Critical (CVSS 10.0): ActiveRecord in Ruby on Rails before 2.3.17 and 3.x before 3.1.0 allows remote attackers to cause a denial of service…
• CVE-2026-33195 — Critical (CVSS 9.8): Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1,…
• CVE-2020-8165 — Critical (CVSS 9.8): A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an…
• CVE-2019-5420 — Critical (CVSS 9.8): A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess…
• CVE-2026-33202 — Critical (CVSS 9.1): Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1,…
• CVE-2020-8163 — High (CVSS 8.8): The is a code injection vulnerability in versions of Rails prior to 5.0.1 that wouldallow an attacker who controlled…

All CVEs affecting Rubyonrails Rails →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

• CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
• CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
• CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
• CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
• CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
• CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →