Answer in brief
CVE-2026-33168 records a Unknown severity vulnerability in Rails has a possible XSS vulnerability in its Action View tag helpers. The current sources do not mark it as known exploited. The current feed maps actionview (rubygems), actionview (rubygems), actionview (rubygems). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps actionview (rubygems), actionview (rubygems), actionview (rubygems). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| actionviewrubygems | >=8.1.0.beta1 <8.1.2.1 | 8.1.2.1 |
| actionviewrubygems | >=8.0.0.beta1 <8.0.4.1 | 8.0.4.1 |
| actionviewrubygems | >=0 <7.2.3.1 | 7.2.3.1 |
Published upstream
Mar 23, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
### Impact 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. ### Releases The fixed releases are available at the normal locations. ### Credit This issue was responsibly reported by Hackerone researcher [taise](https://hackerone.com/taise).
Quoted source text, attributed separately from HOL analysis.