CVE-2026-33167
Rails has a possible XSS vulnerability in its Action Pack debug exceptions
- State
- Published
- Severity
- 1.3 Low
- Published
- Mar 23, 2026
- Updated
- Mar 24, 2026
- Reserved
- Mar 17, 2026
Description
Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 1.3 Low | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U | GitHub_M |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
actionpackrails |
|
References
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