RubyGems/rack CVE-2026-34831: medium 4.8, EPSS 0.24%
Rack has Content-Length mismatch in Rack::Files error responses
Action: Upgrade rack to 2.2.23 or later.
bundle update rackAffected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.2.23 | - |
| 3.0.0.beta1 | 3.1.21 | - |
| 3.2.0 | 3.2.6 | - |
Fixed versions
| 2.2.23 | 3.1.21 | 3.2.6 |
Sources
- osv: GHSA-q2ww-5357-x388
- https://github.com/rack/rack/security/advisories/GHSA-q2ww-5357-x388
- https://nvd.nist.gov/vuln/detail/CVE-2026-34831
- https://github.com/rack/rack
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2026-34831.yml
CVE-2026-34831 · published · modified · JSON