OpenStack Keystone before 26.0.1, 27.0.0, and 28.0.0 allows a /v3/ec2tokens or /v3/s3tokens request with a valid AWS Signature to provide Keystone authorization.
{
"github_reviewed": true,
"github_reviewed_at": "2025-11-17T20:27:00Z",
"cwe_ids": [
"CWE-863"
],
"severity": "HIGH",
"nvd_published_at": "2025-11-17T08:16:25Z"
}