CVE-2026-34827
1 advisory.
RubyGems/rack CVE-2026-34827: high 7.5, EPSS 0.66%
Rack's multipart header parsing allows Denial of Service via escape-heavy quoted parameters
Action: Upgrade rack to 3.1.21 or later.
bundle update rackAffected
| introduced | fixed | last affected |
|---|---|---|
| 3.0.0.beta1 | 3.1.21 | - |
| 3.2.0 | 3.2.6 | - |
Fixed versions
| 3.1.21 | 3.2.6 |
Sources
- osv: GHSA-v6x5-cg8r-vv6x
- https://github.com/rack/rack/security/advisories/GHSA-v6x5-cg8r-vv6x
- https://nvd.nist.gov/vuln/detail/CVE-2026-34827
- https://github.com/rack/rack
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2026-34827.yml
CVE-2026-34827 · published · modified · JSON