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.
https://www.openwall.com/lists/oss-security/2025/11/04/2
http://www.openwall.com/lists/oss-security/2025/11/17/6
Source: Mitre, NVD
Published: 2025-11-17
Updated: 2025-11-18
Base Score: 6.1
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:C/A:N
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
Severity: High
EPSS: 0.00027