Skip to content
Fencer Vulns
high 7.5

CVE-2022-44572 json

Denial of service via multipart parsing in Rack

published 2023-01-18 3 y ago modified 2026-06-17 4 mo ago also GHSA-rqv2-275x-2jq5 , EUVD-2023-0547

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

A denial of service vulnerability in the multipart parsing component of Rack fixed in 2.0.9.2, 2.1.4.2, 2.2.4.1 and 3.0.0.1 could allow an attacker tocraft input that can cause RFC2183 multipart boundary parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted.

Patch / fix

  • rubygems rack 2.0.9.2, 2.1.4.2, 2.2.6.1, 3.0.4.1
  • rack rack 2.0.9.2, 2.1.4.2, 2.2.4.1
  • ruby-rack Debian 14, Debian 13, Debian 12 2.2.4-3

debian advisories DEBIAN-CVE-2022-44572

  • ruby-rack Ubuntu 22.04 LTS 2.1.4-5ubuntu1.1
  • ruby-rack Ubuntu Pro 20.04 LTS 2.0.7-2ubuntu0.1+esm3
  • ruby-rack Ubuntu Pro 22.04 LTS 2.1.4-5ubuntu1+esm3

ubuntu advisories UBUNTU-CVE-2022-44572

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • foreman satellite utils 6.14, satellite capsule 6.14, satellite 6.14 3.7.0.9-1.el8sat
  • foreman-cli satellite utils 6.14, satellite 6.14 3.7.0.9-1.el8sat
  • foreman-ec2 satellite 6.14 3.7.0.9-1.el8sat
  • rubygem-git satellite 6.14 1.18.0-1.el8sat
  • puppet-agent satellite capsule 6.14, satellite 6.14 7.26.0-3.el8sat
  • puppetserver satellite capsule 6.14, satellite 6.14 7.11.0-1.el8sat
  • rubygem-rack satellite capsule 6.14, satellite 6.14 2.2.7-1.el8sat
  • foreman-ovirt satellite 6.14 3.7.0.9-1.el8sat

red hat advisories RHSA-2023:6818

  • rubygem-rack SLE High Availability Extension 15 SP4, SLE High Availability Extension 15 SP3, SLE High Availability Extension 15 SP2 +2 more 2.0.8-150000.3.12.1

suse advisories SUSE-SU-2023:0276-1

  • rubygem-rack openSUSE Tumbleweed 3.1.18-1.3
  • rubygem-rack-2.2 openSUSE Tumbleweed 2.2.22-1.1
  • rubygem-rack openSUSE Tumbleweed 3.1.12-1.1
  • rubygem-rack-2.2 openSUSE Tumbleweed 2.2.11-1.1
  • rubygem-rack openSUSE Tumbleweed 3.0.4.1-1.1
  • rubygem-rack-2.2 openSUSE Tumbleweed 2.2.6.2-1.1
  • ruby3.2-rubygem-rack-2.2 openSUSE Tumbleweed 2.2.7-1.1
  • ruby3.2-rubygem-rack openSUSE Tumbleweed 3.0.7-1.2

opensuse advisories openSUSE-SU-2026:10358-1openSUSE-SU-2026:10286-1openSUSE-SU-2025:14875-1openSUSE-SU-2025:14811-1openSUSE-SU-2024:12633-1openSUSE-SU-2024:12634-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-44572 updated cvss 7.5

rubygem-rack: denial of service in Content-Disposition parsing

  • Red Hat Satellite 6.14 for RHEL 8 rubygem-rack 2.2.7-1.el8sat
    fixed: vendor fix RHSA-2023:6818
  • Red Hat Satellite 6.14 for RHEL 8 cjson 1.7.14-5.el8sat, katello 4.9.0-1.el8sat, libsolv 0.7.22-4.el8pc, libcomps 0.1.18-4.el8pc, python-idna 3.3-2.el8pc, candlepin 4.3.1-1.el8sat, +668 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.62% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
rubygems rack
>=2.0.0, <2.0.9.2
>=2.1.0.0, <2.1.4.2
>=2.2.0.0, <2.2.6.1
>=3.0.0.0, <3.0.4.1
2.0.9.2
2.1.4.2
2.2.6.1
3.0.4.1

Affected products

  • n/a https://github.com/rack/rack

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-1333 Inefficient Regular Expression Complexity

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.