What’s Vulnerable › Vulnerabilities

CVE-2022-30123: Possible shell escape sequence injection vulnerability in Rack

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% 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-150

Description

A sequence injection vulnerability exists in Rack <2.0.9.1, <2.1.4.1 and <2.2.3.1 which could allow is a possible shell escape in the Lint and CommonLogger components of Rack.

Affected products

• Debian Linux: 11.0
• Rack Project Rack: 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: before 2.0.9.1; from 2.1 before 2.1.4.1; from 2.2 before 2.2.3.1; 0.1.0, 0.2.0, 0.3.0, 0.4.0, 0.9.0, 0.9.1 (+84) — 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-2022-30123-possible-shell-escape-sequence-injection-vulnerability-in-rack/80728
• https://security.gentoo.org/glsa/202310-18
• https://security.netapp.com/advisory/ntap-20231208-0011/
• https://www.debian.org/security/2023/dsa-5530
• https://discuss.rubyonrails.org/t/cve-2022-30123-possible-shell-escape-sequence-injection-vulnerability-in-rack/80728
• https://security.gentoo.org/glsa/202310-18
• https://security.netapp.com/advisory/ntap-20231208-0011/
• https://www.debian.org/security/2023/dsa-5530

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