Vulnerability · Published Mar 23, 2026 · Assigned by GitHub_M
CVE-2026-33168Rails has a possible XSS vulnerability in its Action View tag helpers
Low 2.3
In plain English
A low-severity cross-site scripting in actionview from rails. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rails | 2:6.1.7.10+dfsg-1~deb12u3 | DEBIAN-CVE-2026-33168 |
| Debian:13 | rails | 2:7.2.2.2+dfsg-2~deb13u2 | DEBIAN-CVE-2026-33168 |
| Debian:14 | rails | 2:7.2.3.1+dfsg-1 | DEBIAN-CVE-2026-33168 |
| RubyGems | actionview | 8.1.2.1 | GHSA-v55j-83pf-r9cq |
| RubyGems | actionview | 8.0.4.1 | GHSA-v55j-83pf-r9cq |
| RubyGems | actionview | 7.2.3.1 | GHSA-v55j-83pf-r9cq |
| Ubuntu:24.04:LTS | rails | no fix listed | UBUNTU-CVE-2026-33168 |
| Ubuntu:25.10 | rails | no fix listed | UBUNTU-CVE-2026-33168 |
| Ubuntu:26.04:LTS | rails | no fix listed | UBUNTU-CVE-2026-33168 |
| Ubuntu:26.10 | rails | no fix listed | UBUNTU-CVE-2026-33168 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| rails | actionview | >= 8.1.0.beta1, < 8.1.2.1>= 8.0.0.beta1, < 8.0.4.1< 7.2.3.1 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/rails/rails/security/advisories/GHSA-v55j-83pf-r9cq x_refsource_CONFIRM
- https://github.com/rails/rails/commit/0b6f8002b52b9c606fd6be9e7915d9f944cf539c x_refsource_MISC
- https://github.com/rails/rails/commit/63f5ad83edaa0b976f82d46988d745426aa4a42d x_refsource_MISC
- https://github.com/rails/rails/commit/c79a07df1e88738df8f68cb0ee759ad6128ca924 x_refsource_MISC
- https://github.com/rails/rails/releases/tag/v7.2.3.1 x_refsource_MISC
- https://github.com/rails/rails/releases/tag/v8.0.4.1 x_refsource_MISC
- https://github.com/rails/rails/releases/tag/v8.1.2.1 x_refsource_MISC