CVE-2022-30123

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.

Published: 2022-12-05 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-30123 is rated High Risk (65.9/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.80%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-30123

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.32% 1.80% -0.52%
2 2026-05-31 2.21% 2.32% +0.12%
3 2026-04-29 — 2.21% —

Full EPSS history (49 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-30123

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 6.0 [email protected]

Weakness enumeration for CVE-2022-30123

GitHub Security Advisory for CVE-2022-30123

GHSA-wq4h-7r42-5hrr · Severity: critical · Ecosystem: rubygems — Possible shell escape sequence injection vulnerability in Rack

OS Trackers for CVE-2022-30123

vendor priority summary link
debian not yet assigned CVE-2022-30123 not yet assigned priority: Debian including 1 source packages (ruby-rack), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2022-30123
gentoo high CVE-2022-30123: 1 GLSA(s) (202310-18), 1 atom(s) (dev-ruby/rack); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-30123
redhat high — https://access.redhat.com/security/cve/CVE-2022-30123
suse critical — https://www.suse.com/security/cve/CVE-2022-30123/
ubuntu medium CVE-2022-30123 medium priority: Ubuntu including 1 source packages (ruby-rack), 13 status rows across 13 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): not-affected 6, released 6, ignored 1. https://ubuntu.com/security/CVE-2022-30123

Affected software / configurations for CVE-2022-30123

Vendor Product Version Raw CPE
rack_project rack < 2.0.9.1 cpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack_project rack >= 2.1.0, < 2.1.4.1 cpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack_project rack >= 2.2.0, < 2.2.3.1 cpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2022-30123

cvelogic Threat Intelligence