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date: Thu, 31 Jul 2025 05:12:47 GMT
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Denial of service via malicious preflight requests in github.com/rs/cors · GHSA-mh55-gqvf-xfwm · GitHub Advisory Database · GitHub
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GHSA-mh55-gqvf-xfwm
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Denial of service via malicious preflight requests in github.com/rs/cors
Moderate severity
GitHub Reviewed
Published
Jul 5, 2024
to the GitHub Advisory Database
•
Updated Jul 5, 2024
Description
Published to the GitHub Advisory Database
Jul 5, 2024
Reviewed
Jul 5, 2024
Last updated
Jul 5, 2024
Severity
Moderate
EPSS score
Weaknesses
Weakness CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.CVE ID
No known CVE
GHSA ID
GHSA-mh55-gqvf-xfwm
Source code
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Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.
References