VDB
CISA-2026-33167
CISA-2026-33167
PUBLISHED
CVSS 1.3 LOW
Reported by GitHub_M · Published March 23, 2026
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.
Risk Scores
CVSS 4.0
1.3
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| rails | actionpack | >= 8.1.0, < 8.1.2.1 |
| Cloudflare | pages | |
| rails | actionpack | >= 8.1.0, < 8.1.2.1, >= 8.1.0, < 8.1.2.1, >= 8.1.0, < 8.1.2.1 |
| AWS | config |
Timeline
- Mar 23, 2026 CVE Published
- Mar 24, 2026 CVE Updated
References
- https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6 x_refsource_CONFIRM
- https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0 x_refsource_MISC
- https://github.com/rails/rails/releases/tag/v8.1.2.1 x_refsource_MISC