CVE-2022-44572: rack Uncontrolled Resource Consumption
Vulnerability summary
CVE-2022-44572 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in rack. EPSS estimates a 1.62% chance of exploitation in the next 30 days, higher than 76% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 17 · Related 13Timeline
- 09-02-2023PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.62%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.62% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-1333Inefficient Regular Expression ComplexityThe product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- ruby-rack< 2.2.4-3
Rack1 product
- rack< 2.0.9.2 | ≥ 2.1.0, < 2.1.4.2 | ≥ 2.2.0, < 2.2.4.1
RubyGems1 product
- 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
Ubuntu1 product
- ruby-rack< 2.0.7-2ubuntu0.1+esm3 | < 2.1.4-5ubuntu1.1 | < 2.1.4-5ubuntu1+esm3
4 vendors · 4 products
