Vulnerability in Rack
CVE-2024-26146
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.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.020 (78.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Rack — versions >= 3.0.0, < 3.0.9.1, >= 2.2.0, < 2.2.8.1, >= 2.1.0, < 2.1.4.4
- Debian Debian_linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Vendor Advisory)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Mailing List)
- security-advisories@github.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2024-26146?
- CVE-2024-26146 is a medium-severity vulnerability in Rack, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2024-02-29.
- How severe is CVE-2024-26146?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2024-26146 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.