CVE-2024-26141 — Uncontrolled Resource Consumption in Rack

CWE-400 — Uncontrolled Resource ConsumptionCWE-770 — Allocation of Resources Without Limits or ThrottlingCWE-1333 — Regex Denial of Service22 documents8 sources
Severity
7.5HIGHNVD
NVD5.3OSV5.3
EPSS
0.4%
top 40.66%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
RackDebian Ruby-rackDebian Linux
Timeline
PublishedFeb 29
Latest updateApr 2

Description

Rack is a modular Ruby web server interface. Carefully crafted Range headers can cause a server to respond with an unexpectedly large response. Responding with such large responses could lead to a denial of service issue. Vulnerable applications will use the `Rack::File` middleware or the `Rack::Utils.byte_ranges` methods (this includes Rails applications). The vulnerability is fixed in 3.0.9.1 and 2.2.8.1.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶debiandebian/ruby-rack< ruby-rack 2.2.6.4-1+deb12u1 (bookworm)+1
▶CVEListV5rack/rack< 2.2.23+2
▶NVDrack/rack1.3.0 — 2.2.8.1+1
▶RubyGemsrack/rack3.0.0 — 3.0.9.1+4

Also affects: Debian Linux 10.0

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

10
OSV
CVE-2026-34826: Rack is a modular Ruby web server interface↗2026-04-02
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GHSA
Rack's multipart byte range processing allows denial of service via excessive overlapping ranges↗2026-04-02
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OSV
Rack's multipart byte range processing allows denial of service via excessive overlapping ranges↗2026-04-02
▶
OSV
ruby-rack vulnerabilities↗2024-09-26
▶
OSV
ruby-rack vulnerabilities↗2024-08-19
▶

📋Vendor Advisories

8
Red Hat
rack: Rack: Denial of Service via malicious HTTP Range header↗2026-04-02
▶
Debian
CVE-2026-34826: ruby-rack - Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, a...↗2026
▶
Ubuntu
Rack vulnerabilities↗2024-09-26
▶
Ubuntu
Rack vulnerabilities↗2024-08-19
▶
Ubuntu
Rack vulnerabilities↗2024-06-17
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-34826 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶

💬Community

1
HackerOne
Possible DoS Vulnerability with Range Header in Rack↗2024-09-25
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