CVE-2026-34826
- Source
- https://cve.org/CVERecord?id=CVE-2026-34826
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-34826.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-34826
- Aliases
- Downstream
- Related
- Published
- 2026-04-02T16:45:53.964Z
- Modified
- 2026-05-28T03:55:51.156229527Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- Rack: Unbounded Range Count in get_byte_ranges Enables DoS
- Details
-
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.getbyteranges parses the HTTP Range header without limiting the number of individual byte ranges. Although the existing fix for CVE-2024-26141 rejects ranges whose total byte coverage exceeds the file size, it does not restrict the count of ranges. An attacker can supply many small overlapping ranges such as 0-0,0-0,0-0,... to trigger disproportionate CPU, memory, I/O, and bandwidth consumption per request. This results in a denial of service condition in Rack file-serving paths that process multipart byte range responses. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
- Database specific
{ "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34826.json", "cwe_ids": [ "CWE-400", "CWE-770" ] }- References