CVE-2018-16470: rack_project rack Uncontrolled Resource Consumption
Vulnerability summary
CVE-2018-16470 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in rack_project rack. EPSS estimates a 2.03% chance of exploitation in the next 30 days, higher than 81% 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 3 · Related 2Timeline
- 13-11-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
There is a possible DoS vulnerability in the multipart parser in Rack before 2.0.6. Specially crafted requests can cause the multipart parser to enter a pathological state, causing the parser to use CPU resources disproportionate to the request size.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · RubygemsEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.03%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.03% 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 causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Rack1 product
- rack2.0.6
Rack_project1 product
- rack2.0.4 | 2.0.5
RubyGems1 product
- rack≥ 2.0.4, < 2.0.6
3 vendors · 3 products
References
7 links- groups.google.com/forum/X Refsource MISC
- github.com/rack/rackPACKAGE