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.

Published: 2015-07-26 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2015-3226

EPSS CVSS CWE GHSA Affected OS Tracker

Conclusion & alert: CVE-2015-3226 is rated Moderate Risk (49.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.78%). Core evidence: EPSS rose +2.57% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-3226

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.21%	2.78%	+2.57%
2	2025-06-04	0.29%	0.21%	-0.07%
3	2025-06-01	—	0.29%	—

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-3226

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	8.6	2.9	[email protected]

Weakness enumeration for CVE-2015-3226

CWE-79 MITRE ↗

GitHub Security Advisory for CVE-2015-3226

GHSA-vxvp-4xwc-jpp6 · Severity: medium · Ecosystem: rubygems — activesupport Cross-site Scripting vulnerability

OS Trackers for CVE-2015-3226

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2015-3226 not yet assigned priority: Debian including 1 source packages (rails), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2015-3226
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2015-3226
`ubuntu`	medium	CVE-2015-3226 medium priority: Ubuntu including 10 source packages (rails, rails-4.0, …), 130 status rows across 13 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): DNE 104, not-affected 13, ignored 10, needed 1, needs-triage 1, released 1.	https://ubuntu.com/security/CVE-2015-3226

Affected software / configurations for CVE-2015-3226

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

References for CVE-2015-3226

URL	Tags
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	Vendor Advisory

cvelogic Threat Intelligence