CVE-2021-27358 Denial of service in Grafana

What is CVE-2021-27358?

CVE-2021-27358 is a high-severity denial of service vulnerability in Grafana Grafana, published on 18 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The snapshot feature in Grafana 6.7.3 through 7.4.1 can allow an unauthenticated remote attackers to trigger a Denial of Service via a remote API call if a commonly used configuration is set.

Which versions are affected by CVE-2021-27358?

3 open source packages ship an affected version, including github.com/grafana/grafana and grafana. It affects 2 products.

Products include Grafana Grafana, Netapp E-Series Performance Analyzer.

How do I fix CVE-2021-27358?

Upgrade github.com/grafana/grafana to 7.4.2 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-27358 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-27358 exists.

Public exploit code: 1 Nuclei template.

Other vulnerabilities in Grafana Grafana

• CVE-2021-43798 Grafana Path Traversal Exploited High 7.5
• CVE-2025-41115 Incorrect privilege assignment Critical 10.0
• CVE-2022-39328 Grafana vulnerable to race condition allowing privilege escalation Critical 9.8
• CVE-2022-28660 Auth bypass in n/a Critical 9.8
• CVE-2022-26148 Information disclosure in n/a Critical 9.8

All Grafana Grafana vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-grafana-2021-27358, GHSA-h5rh-w6vm-9ghc, UBUNTU-CVE-2021-27358.