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

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0068, the 52nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:16 UTC First seen by agentprime
2. 31 Oct 2026, 15:16 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-v55j-83pf-r9cq
• OSV: GHSA-v55j-83pf-r9cq
• github.com/rails/rails/security/advisories/GHSA-v55j-83pf-r9cq
• nvd.nist.gov/vuln/detail/CVE-2026-33168
• github.com/rails/rails/commit/0b6f8002b52b9c606fd6be9e7915d9f944cf539c
• github.com/rails/rails/commit/63f5ad83edaa0b976f82d46988d745426aa4a42d
• github.com/rails/rails/commit/c79a07df1e88738df8f68cb0ee759ad6128ca924
• github.com/rails/rails
• github.com/rails/rails/releases/tag/v7.2.3.1
• github.com/rails/rails/releases/tag/v8.0.4.1
• github.com/rails/rails/releases/tag/v8.1.2.1
• github.com/rubysec/ruby-advisory-db/blob/master/gems/actionview/CVE-2026-33168.yml

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.