OpenStack Identity Keystone and keystonemiddleware Insufficiently Protected Credentials
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | keystone | >= 8.0, < 8.1.0, >= 9.0.0.0b1, < 9.0.0.0b2 | 8.1.0, 9.0.0.0b2 |
| Python (PyPI) | keystonemiddleware | < 1.5.4, >= 1.6.0, < 2.3.3 | 1.5.4, 2.3.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2015-7546
- https://github.com/openstack/keystone/commit/bff03b5726fe5cac93d44a66715eea49b89c8cb0
- https://github.com/openstack/keystone/commit/d5378f173da14a34ca010271477337879002d6d0
- https://github.com/openstack/keystonemiddleware/commit/96ab58e6863c92575ada57615b19652e502adfd8
- https://bugs.launchpad.net/keystone/+bug/1490804
- https://github.com/pypa/advisory-database/tree/main/vulns/keystonemiddleware/PYSEC-2016-20.yaml
- https://security.openstack.org/ossa/OSSA-2016-005.html
- https://web.archive.org/web/20200228002640/http://www.securityfocus.com/bid/80498
- https://wiki.openstack.org/wiki/OSSN/OSSN-0062
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.securityfocus.com/bid/80498
- https://github.com/advisories/GHSA-8c4w-v65p-jvcv
- https://pypi.org/project/keystone
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-522- Platform
- Python (PyPI)
- Package
keystone, keystonemiddleware- Disclosed
- 03.02.2016
- Updated
- 11.10.2026 14:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2016-20 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-8c4w-v65p-jvcv - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-2549 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: keystonemiddleware
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 10.2014 02.2016
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 3
Disclosures per year
- 2017: 0
- 2018: 0
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
earlier: 3
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