#VU118722 Allocation of Resources Without Limits or Throttling in cors - CVE-2025-47908
Published: November 24, 2025
Vulnerability identifier: #VU118722
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-47908
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
cors
cors
Software vendor:
Olivier Poitrey
Olivier Poitrey
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to middleware causing 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. A remote attacker can produce undue load on the middleware/server as an attempt to cause a denial of service.
Remediation
Install updates from vendor's website.