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Vulnerability record · CVE-2024-25126 · published 29 February 2024

CVE-2024-25126: Rack inefficient regular expression (redos) vulnerability

Rack · Rack

Rack is a modular Ruby web server interface. Carefully crafted content type headers can cause Rack’s media type parser to take much longer than expected, leading to a possible denial of service vulnerability (ReDos 2nd degree polynomial). This vulnerability is patched in 3.0.9.1 and 2.2.8.1.

7.5 CVSS 3.1 High EPSS 35% · top 1.6% CWE-1333 · Inefficient regular expression (ReDoS)
7.5CVSS 3.1 base score
35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References, 6 tagged exploit
17 Jun 2026Last modified by NVD

Description

Rack is a modular Ruby web server interface. Carefully crafted content type headers can cause Rack’s media type parser to take much longer than expected, leading to a possible denial of service vulnerability (ReDos 2nd degree polynomial). This vulnerability is patched in 3.0.9.1 and 2.2.8.1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://discuss.rubyonrails.org/t/denial-of-service-vulnerability-in-rack-content-type-parsing/84941 ExploitVendor Advisory
https://github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462 Patch
https://github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49 Patch
https://github.com/rack/rack/security/advisories/GHSA-22f2-v57c-j9cx ExploitVendor Advisory
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-25126.yml ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html Mailing List
https://security.netapp.com/advisory/ntap-20240510-0005/ Third Party Advisory
https://discuss.rubyonrails.org/t/denial-of-service-vulnerability-in-rack-content-type-parsing/84941 ExploitVendor Advisory
https://github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462 Patch
https://github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49 Patch
https://github.com/rack/rack/security/advisories/GHSA-22f2-v57c-j9cx ExploitVendor Advisory
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-25126.yml ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html Mailing List
https://security.netapp.com/advisory/ntap-20240510-0005/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2024-25126), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.