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CVE-2024-26146 Details

Description

Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial of service issue. Accept and Forwarded headers are impacted. Ruby 3.2 has mitigations for this problem, so Rack applications using Ruby 3.2 or newer are unaffected. This vulnerability is fixed in 2.0.9.4, 2.1.4.4, 2.2.8.1, and 3.0.9.1.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942	CVE	Vendor Advisory
https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716	CVE	Patch
https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582	CVE	Patch
https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f	CVE	Patch
https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd	CVE	Patch
https://github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f	CVE	Vendor Advisory
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26146.yml	CVE	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html	CVE	Mailing List
https://security.netapp.com/advisory/ntap-20240510-0006/	CVE	Third Party Advisory
https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942	[email protected]	Vendor Advisory
https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716	[email protected]	Patch
https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582	[email protected]	Patch
https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f	[email protected]	Patch
https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd	[email protected]	Patch
https://github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f	[email protected]	Vendor Advisory
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26146.yml	[email protected]	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html	[email protected]	Mailing List
https://security.netapp.com/advisory/ntap-20240510-0006/	[email protected]	Third Party Advisory

see all 18 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1333	Inefficient Regular Expression Complexity	[email protected]
CWE-1333	Inefficient Regular Expression Complexity	[email protected]

Affected Products

Product	Versions
rack rack	>= 0.4, < 2.0.9.4 >= 2.1.0, < 2.1.4.4 >= 2.2.0, < 2.2.8.1
CPE cpe:2.3:a:rack:rack::::::ruby::* Remediation No remediation found in references.
debian debian linux	10.0
CPE cpe:2.3:o:debian:debian_linux:10.0:::::::* Remediation No remediation found in references.

Change History

9 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Feb 14, 2025	Initial Analysis	[email protected]
Feb 13, 2025	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
Jun 10, 2024	CVE Modified	[email protected]
May 14, 2024	CVE Modified	[email protected]
Apr 29, 2024	CVE Modified	[email protected]
Feb 29, 2024	New CVE Received	[email protected]