# CVE-2021-27358: Denial of service in Grafana

> Unauthenticated attackers can cause a denial of service in Grafana via the snapshot feature if a common configuration is enabled.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** BIT-grafana-2021-27358, GHSA-h5rh-w6vm-9ghc, UBUNTU-CVE-2021-27358

## 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.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/grafana/grafana` | Go | From 6.7.3 | 7.4.2 |
| `github.com/grafana/grafana` | Go | From 6.7.3 | 7.4.2 |
| `grafana` | Bitnami | From 6.7.3 | 7.4.2 |

Products: 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.

## 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:

- Grafana Unauthenticated Snapshot Creation (nuclei): http/cves/2021/CVE-2021-27358.yaml

## Other vulnerabilities in Grafana Grafana

- [CVE-2021-43798](https://insights.sbomify.com/CVE-2021-43798/): Grafana Path Traversal (high 7.5, exploited in the wild)
- [CVE-2025-41115](https://insights.sbomify.com/CVE-2025-41115/): Incorrect privilege assignment (critical 10.0)
- [CVE-2022-39328](https://insights.sbomify.com/CVE-2022-39328/): Grafana vulnerable to race condition allowing privilege escalation (critical 9.8)
- [CVE-2022-28660](https://insights.sbomify.com/CVE-2022-28660/): Auth bypass in n/a (critical 9.8)
- [CVE-2022-26148](https://insights.sbomify.com/CVE-2022-26148/): Information disclosure in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27358 and fix it if it is affected.

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

Affected packages and fixed versions:
- github.com/grafana/grafana (Go): affected from 6.7.3; fixed in 7.4.2
- github.com/grafana/grafana (Go): affected from 6.7.3; fixed in 7.4.2
- grafana (Bitnami): affected from 6.7.3; fixed in 7.4.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-27358/ (Markdown: https://insights.sbomify.com/CVE-2021-27358/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27358
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27358
- OSV: https://osv.dev/vulnerability/CVE-2021-27358

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27358/
Summaries are generated and may contain mistakes; the official description above is the record.