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CVE-2026-33168

Rails has a possible XSS vulnerability in its Action View tag helpers

Published: Mar 23, 2026Updated: Apr 16, 2026 Sources: CVE List NVD BDUCWE-79
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.5%
Top 60.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Action View provides conventions and helpers for building web pages with the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when a blank string is used as an HTML attribute name in Action View tag helpers, the attribute escaping is bypassed, producing malformed HTML. A carefully crafted attribute value could then be misinterpreted by the browser as a separate attribute name, possibly leading to XSS. Applications that allow users to specify custom HTML attributes are affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

CVSS Vector Breakdown

AV:NAC:LC:LI:LA:N
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:LConfidentiality
L
I:LIntegrity
L
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

actionviewrails
Library
OSS Libraries / web-framework
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
ActionViewRails Core Team
Library
OSS Libraries / web-framework
railsoss-projectOSS Librariesaka rails-html-sanitizer, activestorage
ооо «ред софт»commercialRUOperating Systemsaka red soft
rails core teamoss-projectOSS Librariesaka rubyonrails, rails, actionview, rack? no

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/rails/rails/commit/0b6f8002b52b9c606fd6be9e7915d9f944cf539c
github.com
https://github.com/rails/rails/commit/63f5ad83edaa0b976f82d46988d745426aa4a42d
github.com
https://github.com/rails/rails/commit/c79a07df1e88738df8f68cb0ee759ad6128ca924
github.com
and 13 more references View all →

Timeline

Published
Mar 23, 2026
Last Updated
Apr 16, 2026

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