CVE-2025-46727
Description
A flaw was found in Rack::QueryParser. This vulnerability allows denial of service via oversized HTTP requests containing many parameters, resulting in memory exhaustion that consumes all available memory or CPU resource pinning, which keeps the CPU constantly busy.
Statement
This vulnerability is rated as an IMPORTANT severity because the vulnerabilty was found in the Rack::QueryParser component which arises because Rack::QueryParser parses query strings and application/x-www-form-urlencoded bodies into Ruby data structures without imposing any limit on the number of parameters, when an attacker sends requests with an extremely large number of parameters, Rack::QueryParser consumes excessive memory and CPU during parsing, leading to memory exhaustion, this results in a denial of service, causing the Rack server to crash and leading to full service disruption.
Red Hat Satellite 6.15 includes an affected version of rubygem-rack; however, since it does not utilize Rack::QueryParser, it is not actually vulnerable to the flaw, lowering product-specific impact. The issue has already been addressed in Red Hat Satellite versions 6.16 and 6.17, and updates for other supported versions may follow based on the product lifecycle policy.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | 7.5 | 7.5 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | None | None | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | None |
| Integrity Impact | None | None | None |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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