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Not in CISA KEV
MEDIUM severity

CVE-2013-4294 — keystone

MEDIUM

CVE-2013-4294 is a medium-severity (CVSS 5.3) CWE-264 vulnerability in keystone. A fix is available for keystone — see the affected versions and patch details below.

OpenStack Identity (Keystone) allows remote attackers to bypass intended access restrictions via revoked PKI token

Also known asGHSA-5qpp-v56f-mqfmPYSEC-2013-42
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs86th percentile — riskier than 86% of all scored CVEsHighest risk
0.23%1.24%2.25%3.26%0.8%2.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍keystone

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

The (1) mamcache and (2) KVS token backends in OpenStack Identity (Keystone) Folsom 2012.2.x and Grizzly before 2013.1.4 do not properly compare the PKI token revocation list with PKI tokens, which allow remote attackers to bypass intended access restrictions via a revoked PKI token.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIkeystone≥ 2012.2.0&&< 2013.1.42013.1.4pip install --upgrade 'keystone==2013.1.4'

Affected Products

1 product · 9 configurations
Application
keystoneopenstack
9 versions
2012.22012.2.12012.2.22012.2.32012.2.42013.12013.1.12013.1.22013.1.3

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for keystone, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update keystone to 2013.1.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-4294 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate
ProductFixed inAdvisory
OpenStack 3 for RHEL 6openstack-keystone-0:2013.1.3-2.el6ostRHSA-2013:1285
Ubuntu
USN-2002-1Ubuntu

Frequently Asked Questions

The (1) mamcache and (2) KVS token backends in OpenStack Identity (Keystone) Folsom 2012.2.x and Grizzly before 2013.1.4 do not properly compare the PKI token revocation list with PKI tokens, which allow remote attackers to bypass intended access restrictions via a revoked PKI token.
O3 Security · Impact-Aware SCA

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CVE-2013-4294: keystone — Fixed in 2013.1.4