OpenStack Glance is affected by Server-Side Request Forgery (SSRF)GHSA-mc26-q38v-83gv
MEDIUMGHSA-mc26-q38v-83gv is a medium-severity (CVSS 5) Server-Side Request Forgery (SSRF) vulnerability in glance. A fix is available for glance — see the affected versions and patch details below.
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for GHSA-mc26-q38v-83gv.
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
glance🐍glance🐍glanceReal-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 Glance versions < 29.1.1, >= 30.0.0 < 30.1.1, == 31.0.0 are affected by Server-Side Request Forgery (SSRF). By use of HTTP redirects, an authenticated user can bypass URL validation checks and redirect to internal services. Only the glance image import functionality is affected. In particular, the web-download and glance-download import methods are subject to this vulnerability, as is the optional (not enabled by default) ovf_process image import plugin.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | glance | all versions | 29.2.0pip install --upgrade 'glance==29.2.0' |
| 🐍PyPI | glance | ≥ 30.0.0&&< 30.2.0 | 30.2.0pip install --upgrade 'glance==30.2.0' |
| 🐍PyPI | glance | ≥ 31.0.0&&< 31.1.0 | 31.1.0pip install --upgrade 'glance==31.1.0' |
Affected Products
glanceopenstackDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for glance, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update glance to 29.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mc26-q38v-83gv is resolved across your whole dependency graph.
Workarounds
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.
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.
This is an IMPORTANT flaw in OpenStack Glance's web-download import feature allows an authenticated user to perform Server-Side Request Forgery (SSRF). The vulnerability arises from insufficient validation of URIs, which can be bypassed through HTTP redirects or alternative IP encodings. This enables an attacker to…
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.Source: Red Hat security advisory for GHSA-mc26-q38v-83gv (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat OpenStack Platform 16.2 | openstack-glance-1:19.0.5-2.20260512165254.eb6ad61.el8ost | RHSA-2026:54757 |
| Red Hat OpenStack Services on OpenShift 18.0 | openstack-glance-1:26.1.1-18.0.20260422134725.c2ac316.el9ost | RHSA-2026:39812 |
Frequently Asked Questions
Is GHSA-mc26-q38v-83gv in your dependencies?
Find it across PyPI, including transitive dependencies.