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Vulnerability record · CVE-2015-7546 · published 3 February 2016

CVE-2015-7546: Openstack keystonemiddleware insufficiently protected credentials vulnerability

Openstack · Keystonemiddleware

The identity service in OpenStack Identity (Keystone) before 2015.1.3 (Kilo) and 8.0.x before 8.0.2 (Liberty) and keystonemiddleware (formerly python-keystoneclient) before 1.5.4 (Kilo) and Liberty before 2.3.3 does not properly invalidate authorization tokens when using the PKI or PKIZ token providers, which allows remote authenticated users to bypass intended access restrictions and gain access to cloud resources by manipulating byte fields within a revoked token.

7.5 CVSS 3.1 High EPSS 1.7% · top 23.4% CWE-522 · Insufficiently protected credentials
7.5CVSS 3.1 base score, v2 6.0
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

The identity service in OpenStack Identity (Keystone) before 2015.1.3 (Kilo) and 8.0.x before 8.0.2 (Liberty) and keystonemiddleware (formerly python-keystoneclient) before 1.5.4 (Kilo) and Liberty before 2.3.3 does not properly invalidate authorization tokens when using the PKI or PKIZ token providers, which allows remote authenticated users to bypass intended access restrictions and gain access to cloud resources by manipulating byte fields within a revoked token.

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securityfocus.com/bid/80498 Third Party AdvisoryVDB Entry
https://bugs.launchpad.net/keystone/+bug/1490804 Issue TrackingThird Party Advisory
https://security.openstack.org/ossa/OSSA-2016-005.html PatchVendor Advisory
https://wiki.openstack.org/wiki/OSSN/OSSN-0062 Vendor Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securityfocus.com/bid/80498 Third Party AdvisoryVDB Entry
https://bugs.launchpad.net/keystone/+bug/1490804 Issue TrackingThird Party Advisory
https://security.openstack.org/ossa/OSSA-2016-005.html PatchVendor Advisory
https://wiki.openstack.org/wiki/OSSN/OSSN-0062 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2015-7546), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.