CVE-2025-47908 — Denial of service via malicious preflight requests in github.com/rs/cors
Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value c…
Published: 2025-08-06 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7