DEBIAN-CVE-2026-34827
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-34827
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34827.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-34827
- Upstream
- Published
- 2026-04-02T18:16:33Z
- Modified
- 2026-09-14T17:03:28Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Multipart::Parser#handle_mime_head parses quoted multipart parameters such as Content-Disposition: form-data; name="..." using repeated String#index searches combined with String#slice! prefix deletion. For escape-heavy quoted values, this causes super-linear processing. An unauthenticated attacker can send a crafted multipart/form-data request containing many parts with long backslash-escaped parameter values to trigger excessive CPU usage during multipart parsing. This results in a denial of service condition in Rack applications that accept multipart form data. This issue has been patched in versions 3.1.21 and 3.2.6.
- References
Affected packages
Debian:13 / ruby-rack
Package
- Name
- ruby-rack
- Purl
- pkg:deb/debian/ruby-rack?arch=source&distro=trixie
Debian:14 / ruby-rack
Package
- Name
- ruby-rack
- Purl
- pkg:deb/debian/ruby-rack?arch=source&distro=forky