CVE-2017-5936 is a high-severity (CVSS 7.5) vulnerability in nova-lxd. A fix is available for nova-lxd — see the affected versions and patch details below.
OpenStack Nova-LXD bypass security restrictions
EPSS Exploitation Probability
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
nova-lxdReal-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
OpenStack Nova-LXD before 13.1.1 uses the wrong name for the veth pairs when applying Neutron security group rules for instances, which allows remote attackers to bypass intended security restrictions.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | nova-lxd | all versions | 13.1.1pip install --upgrade 'nova-lxd==13.1.1' |
Affected Products
ubuntu linuxcanonicalnova-lxdopenstackDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nova-lxd, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nova-lxd to 13.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-5936 is resolved across your whole dependency graph.
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.
Frequently Asked Questions
Is CVE-2017-5936 in your dependencies?
Find it across PyPI, including transitive dependencies.