CVE-2025-47908

high

Description

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

https://pkg.go.dev/vuln/GO-2024-2883

https://github.com/rs/cors/pull/171

https://github.com/rs/cors/issues/170

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-23882

Details

Source: Mitre, NVD

Published: 2025-08-06

Updated: 2026-04-15

Named Vulnerability: GO-2024-2883Named Vulnerability: GHSA-mh55-gqvf-xfwm

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.00595