Grafana: Security Vulnerabilities
The CVE-2021-36156 fix validates the namespace parameter for path traversal sequences after a single URL decode, by double encoding, an attacker can read files at the Ruler API endpoint /loki/api/v1/rules/{namespace}
Thanks to Prasanth Sundararajan for reporting this vulnerability.
CVSS Score
5.3
EPSS Score
0.0
Published
2026-04-15
---
title: Cross-Tenant Legacy Correlation Disclosure and Deletion
draft: false
hero:
image: /static/img/heros/hero-legal2.svg
content: "# Cross-Tenant Legacy Correlation Disclosure and Deletion"
date: 2026-01-29
product: Grafana
severity: Low
cve: CVE-2026-21727
cvss_score: "3.3"
cvss_vector: "CVSS:3.3/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N"
fixed_versions:
- ">=11.6.11 >=12.0.9 >=12.1.6 >=12.2.4"
---
A cross-tenant isolation vulnerability was found in Grafana’s Correlations feature affecting legacy correlation records. Due to a backward compatibility condition allowing org_id = 0 records to be returned across organizations, a user with datasource management privileges could read and permanently delete legacy correlation data belonging to another organization. This issue affects correlations created prior to Grafana 10.2 and is fixed in >=11.6.11, >=12.0.9, >=12.1.6, and >=12.2.4.
Thanks to Gyu-hyeok Lee (g2h) for reporting this vulnerability.
CVSS Score
3.3
EPSS Score
0.0
Published
2026-04-15
Pyroscope is an open-source continuous profiling database. The database supports various storage backends, including Tencent Cloud Object Storage (COS).
If the database is configured to use Tencent COS as the storage backend, an attacker could extract the secret_key configuration value from the Pyroscope API.
To exploit this vulnerability, an attacker needs direct access to the Pyroscope API. We highly recommend limiting the public internet exposure of all our databases, such that they are only accessible by trusted users or internal systems.
This vulnerability is fixed in versions:
1.15.x: 1.15.2 and above.
1.16.x: 1.16.1 and above.
1.17.x: 1.17.0 and above (i.e. all versions).
Thanks to Théo Cusnir for reporting this vulnerability to us via our bug bounty program.
CVSS Score
9.1
EPSS Score
0.0
Published
2026-04-15
In Grafana's alerting system, users with edit permissions for a contact point, specifically the permissions “alert.notifications:write” or “alert.notifications.receivers:test” that are granted as part of the fixed role "Contact Point Writer", which is part of the basic role Editor - can edit contact points created by other users, modify the endpoint URL to a controlled server. By invoking the test functionality, attackers can capture and extract redacted secure settings, such as authentication credentials for third-party services (e.g., Slack tokens). This leads to unauthorized access and potential compromise of external integrations.
CVSS Score
1.3
EPSS Score
0.0
Published
2026-04-15
When using public dashboards and direct data-sources, all direct data-sources' passwords are exposed despite not being used in dashboards.
No passwords of proxied data-sources are exposed. We encourage all direct data-sources to be converted to proxied data-sources as far as possible to improve your deployments' security.
CVSS Score
6.5
EPSS Score
0.0
Published
2026-03-27
A resample query can be used to trigger out-of-memory crashes in Grafana.
CVSS Score
6.5
EPSS Score
0.0
Published
2026-03-27
The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes.
CVSS Score
7.5
EPSS Score
0.0
Published
2026-03-27
A testdata data-source can be used to trigger out-of-memory crashes in Grafana.
CVSS Score
6.5
EPSS Score
0.0
Published
2026-03-27
A chained attack via SQL Expressions and a Grafana Enterprise plugin can lead to a remote arbitrary code execution impact (RCE). This is enabled by a feature in Grafana (OSS), so all users are always recommended to update to avoid future attack vectors going this path.
Only instances with the sqlExpressions feature toggle enabled are vulnerable.
Only instances in the following version ranges are affected:
- 11.6.0 (inclusive) to 11.6.14 (exclusive): 11.6.14 has the fix. 11.5 and below are not affected.
- 12.0.0 (inclusive) to 12.1.10 (exclusive): 12.1.10 has the fix. 12.0 did not receive an update, as it is end-of-life.
- 12.2.0 (inclusive) to 12.2.8 (exclusive): 12.2.8 has the fix.
- 12.3.0 (inclusive) to 12.3.6 (exclusive): 12.3.6 has the fix.
- 12.4.0 (inclusive) to 12.4.2 (exclusive): 12.4.2 has the fix. 13.0.0 and above also have the fix: no v13 release is affected.
CVSS Score
9.1
EPSS Score
0.001
Published
2026-03-27
A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users to obtain the key used to encrypt trace data stored in S3.
Thanks to william_goodfellow for reporting this vulnerability.
CVSS Score
7.5
EPSS Score
0.0
Published
2026-03-26
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