CVE-2025-47908

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.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47908.json",
    "cna_assigner": "Go"
}

References

Affected packages

Git / github.com/rs/cors

Affected ranges

Type

GIT

Repo

https://github.com/rs/cors

Events

Introduced

5c2b877d2a033557c474bf5f9ed03626bd774839

Fixed

4c32059b2756926619f6bf70281b91be7b5dddb2

Database specific

{
    "extracted_events": [
        {
            "introduced": "1.9.0"
        },
        {
            "fixed": "1.11.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v1.*

v1.10.0

v1.10.1

v1.9.0

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-47908.json"