CVE-2026-33170
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
Rails Active Support has a possible XSS vulnerability in SafeBuffer#%
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-33170
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-33170.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 2:7.2.3.1+dfsg-1 |
| debian | sid | fixed | 2:7.2.3.1+dfsg-1 |
| debian | trixie | affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | activesupport | <~> 7.2.3, >= 7.2.3.1 | ~> 7.2.3, >= 7.2.3.1 |
| RubyGems | activesupport | >=8.1.0.beta1,<8.1.2.1 | 8.1.2.1 |
| RubyGems | activesupport | >=8.0.0.beta1,<8.0.4.1 | 8.0.4.1 |
| RubyGems | activesupport | <7.2.3.1 | 7.2.3.1 |
| RUBYGEMS | activesupport | < 7.2.3.1 | 7.2.3.1 |
| RUBYGEMS | activesupport | >= 8.0.0.beta1, < 8.0.4.1 | 8.0.4.1 |
| RUBYGEMS | activesupport | >= 8.1.0.beta1, < 8.1.2.1 | 8.1.2.1 |
References
- https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
- https://www.suse.com/security/cve/CVE-2026-33170.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-33170
- https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7
- https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db
- https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb
- https://github.com/rails/rails
- https://github.com/rails/rails/releases/tag/v7.2.3.1
- https://github.com/rails/rails/releases/tag/v8.0.4.1
- https://github.com/rails/rails/releases/tag/v8.1.2.1
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2026-33170.yml
- https://security-tracker.debian.org/tracker/CVE-2026-33170
- https://github.com/advisories/GHSA-89vf-4333-qx8v
Verify integrity in audit chain (admin only). AS-IS.