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MEDIUM severity

CVE-2023-1636 — barbican

MEDIUM

CVE-2023-1636 is a medium-severity (CVSS 6) CWE-653 vulnerability in barbican. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Incomplete container isolation

Also known asGHSA-6rx9-c2rh-3qv4PYSEC-2026-1214
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-1636.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs42th percentile — riskier than 42% of all scored CVEsHighest risk
0.00%0.33%0.66%0.98%0.1%0.5%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
🐍barbican

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

A vulnerability was found in OpenStack Barbican containers. This vulnerability is only applicable to deployments that utilize an all-in-one configuration. Barbican containers share the same CGROUP, USER, and NET namespace with the host system and other OpenStack services. If any service is compromised, it could gain access to the data transmitted to and from Barbican.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐍PyPIbarbicanall versionsNo fix

Affected Products

2 products · 4 configurations
Application
barbicanopenstack
all
Application
openstack platformredhat
3 versions
16.116.217.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Remediation status

    The records we use list no patched version of barbican for CVE-2023-1636. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

A vulnerability was found in OpenStack Barbican containers. This vulnerability is only applicable to deployments that utilize an all-in-one configuration. Barbican containers share the same CGROUP, USER, and NET namespace with the host system and other OpenStack services. If any service is compromised, it could gain access to the data transmitted to and from Barbican.
O3 Security · Impact-Aware SCA

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CVE-2023-1636: barbican: Incomplete container isolation