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.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:1958 advisory.

    Keystone is a Python implementation of the OpenStack     (http://www.openstack.org) identity service API.

    Security Fix(es):

    * OpenStack Keystone: Unauthorized access and privilege escalation via AWS     signature validation flaw (CVE-2025-65073)

    For more details about the security issue(s), including the impact, a CVSS     score, acknowledgments, and other related information, refer to the CVE     page listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7926-1 advisory.

    Kay discovered that OpenStack Keystone incorrectly handled the ec2tokens and s3tokens APIs. A remote     attacker could possibly use this issue to obtain unauthorized access and escalate privileges.
    (CVE-2025-65073)

    It was discovered that OpenStack Keystone only validated the first 72 bytes of an application secret. An     attacker could possibly use this issue to bypass password complexity. (CVE-2021-3563)

    It was discovered that OpenStack Keystone had a time lag before a token should be revoked by the security     policy. A remote administrator could use this issue to maintain access for longer than expected.
    (CVE-2022-2447)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-65073)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
298931	RHEL 9 : Red Hat OpenStack Services on OpenShift 18.0 (openstack-keystone) (RHSA-2026:1958)	Nessus	Red Hat Local Security Checks	high
278510	Ubuntu 22.04 LTS : OpenStack Keystone vulnerabilities (USN-7926-1)	Nessus	Ubuntu Local Security Checks	high
275724	Linux Distros Unpatched Vulnerability : CVE-2025-65073	Nessus	Misc.	high

Detections

Analytics

CVE-2025-65073

high

Tenable Plugins

high

high

high