What’s Vulnerable › Vulnerabilities

CVE-2022-30122: Denial of Service Vulnerability in Rack Multipart Parsing

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-05 · updated 2026-06-17
• Weakness: CWE-400

Description

A possible denial of service vulnerability exists in Rack <2.0.9.1, <2.1.4.1 and <2.2.3.1 in the multipart parsing component of Rack.

Affected products

• Debian Linux: 11.0
• Rack Project Rack: from 1.2 before 2.0.9.1; from 2.1.0 before 2.1.4.1; from 2.2.0 before 2.2.3.1 — fixed in 2.0.9.1, 2.1.4.1, 2.2.3.1
• Rubygems Rack: from 1.2 before 2.0.9.1; from 2.1 before 2.1.4.1; from 2.2 before 2.2.3.1; 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5 (+68) — fixed in 2.0.9.1, 2.1.4.1, 2.2.3.1

How to fix

Upgrade to a fixed version: Rack Project Rack 2.0.9.1, 2.1.4.1, 2.2.3.1; Rubygems Rack 2.0.9.1, 2.1.4.1, 2.2.3.1. Check the vendor advisory for mitigations.

References

• https://discuss.rubyonrails.org/t/cve-2022-30122-denial-of-service-vulnerability-in-rack-multipart-parsing/80729
• https://security.gentoo.org/glsa/202310-18
• https://security.netapp.com/advisory/ntap-20231208-0012/
• https://www.debian.org/security/2023/dsa-5530
• https://discuss.rubyonrails.org/t/cve-2022-30122-denial-of-service-vulnerability-in-rack-multipart-parsing/80729
• https://security.gentoo.org/glsa/202310-18
• https://security.netapp.com/advisory/ntap-20231208-0012/
• https://www.debian.org/security/2023/dsa-5530

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