rails: Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework
CVE-2026-33170 is fixed in rails on 1 platform, first by DEBIAN-CVE-2026-33170, released March 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, `SafeBuffer#%` does not propagate the `@html_unsafe` flag to the newly created buffer. If a `SafeBuffer` is mutated in place (e.g. via `gsub!`) and then formatted with `%` using untrusted arguments, the result incorrectly reports `html_safe? == true`, bypassing ERB auto-escaping and possibly leading to XSS. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rails · Debian 12.15 (bookworm) | 2:6.1.7.10+dfsg-1~deb12u3 | DEBIAN-CVE-2026-33170 | Mar 24, 2026 |
| rails · Debian 13.5 (trixie) | 2:7.2.2.2+dfsg-2~deb13u2 | DEBIAN-CVE-2026-33170 | Mar 24, 2026 |
| rails · Debian 14 | 2:7.2.3.1+dfsg-1 | DEBIAN-CVE-2026-33170 | Mar 24, 2026 |
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