CVE-2021-27358 is a high-severity (CVSS 7.5) vulnerability in github.com/grafana/grafana. EPSS puts its 30-day exploitation probability at 83.0% (100th percentile). A fix is available for github.com/grafana/grafana — see the affected versions and patch details below.
Denial of service in Grafana
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
github.com/grafana/grafanaReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
The snapshot feature in Grafana before 7.4.2 can allow an unauthenticated remote attackers to trigger a Denial of Service via a remote API call if a commonly used configuration is set.
Specific Go Packages Affected
github.com/grafana/grafana/pkg/middleware
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/grafana/grafana | ≥ 6.7.3&&< 7.4.2 | 7.4.2go get github.com/grafana/grafana@v7.4.2 |
Affected Products
grafanagrafanae-series performance analyzernetappDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/grafana/grafana, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/grafana/grafana to 7.4.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-27358 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
How to detect CVE-2021-27358
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2021-27358 -u https://target- Template
- Grafana Unauthenticated Snapshot Creation
- Severity
- high
- Impact
- An attacker can create snapshots of sensitive data without authentication, potentially leading to unauthorized access and data exposure.
- Remediation
- Upgrade to the latest version of Grafana that includes a fix for CVE-2021-27358 or apply the provided patch to mitigate the vulnerability.
Template by ProjectDiscovery nuclei-templates (pdteam, bing0o), MIT licensed. View the full template. Scan only systems you are authorised to test.
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.
While in OpenShift Container Platform (OCP), OpenShift ServiceMesh (OSSM) and Red Hat Advanced Cluster Management for Kubernetes (RHACM) there is shipped a vulnerable version of grafana, access to the grafana panel is behind OpenShift OAuth proxy and requires admin permissions. Therefore these components are affected…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 8 | grafana-0:7.5.9-4.el8 | RHSA-2021:4226 |
Frequently Asked Questions
Is CVE-2021-27358 in your dependencies?
Find it across Go, including transitive dependencies.