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
- 2026-04-13T04:27:53.370176Z
- 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
{ "cwe_ids": [ "CWE-400", "CWE-770" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34826.json", "cna_assigner": "GitHub_M" }- References
Affected packages
Git / github.com/rack/rack
Affected ranges
- Type
- GIT
- Repo
- https://github.com/rack/rack
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixedIntroducedFixed
- Database specific
{ "extracted_events": [ { "introduced": "0" }, { "fixed": "2.2.23" }, { "introduced": "3.0.0.beta1" }, { "fixed": "3.1.21" }, { "introduced": "3.2.0" }, { "fixed": "3.2.6" } ], "source": "AFFECTED_FIELD" }
Affected versions
0.*
0.1
0.2
0.3
1.*
1.0
1.3.0
1.3.0.beta
1.3.0.beta2
1.4.0
1.4.1
1.5.0
1.5.1
1.6.0.beta
2.*
2.0.0
2.0.0.alpha
2.0.0.rc1
2.0.1
2.1.0
2.2.0
2.2.3
2.2.4
3.*
3.0.0
3.0.0.beta1
3.0.0.rc1
v2.*
v2.2.1
v2.2.10
v2.2.11
v2.2.12
v2.2.13
v2.2.14
v2.2.15
v2.2.16
v2.2.17
v2.2.18
v2.2.19
v2.2.2
v2.2.20
v2.2.21
v2.2.22
v2.2.5
v2.2.6
v2.2.6.1
v2.2.6.2
v2.2.7
v2.2.8
v2.2.9
v3.*
v3.1.0
v3.1.10
v3.1.11
v3.1.12
v3.1.13
v3.1.14
v3.1.15
v3.1.16
v3.1.17
v3.1.18
v3.1.19
v3.1.2
v3.1.20
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.1.7
v3.1.8
v3.1.9
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5