Grafana's datasource proxy API allows authorization checks to be bypassed

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.0 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS

• CVE-2025-3454: 0.46% estimated exploitation activity in the next 30 days; percentile 39.81 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

This vulnerability in Grafana's datasource proxy API allows authorization checks to be bypassed by adding an extra slash character in the URL path. Users with minimal permissions could gain unauthorized read access to GET endpoints in Alertmanager and Prometheus datasources. The issue primarily affects datasources that implement route-specific permissions, including Alertmanager and certain Prometheus-based datasources.

Published by the source

2 Jun 2025, 12:30 UTC

Last modified by the source

5 Jun 2025, 05:42 UTC

Source last checked

26 Oct 2026, 15:09 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-9j65-rv5x-4vrf

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# Patch Next advisory brief: CVE-2025-3454

Advisory: Grafana's datasource proxy API allows authorization checks to be bypassed
IDs: CVE-2025-3454, GHSA-9j65-rv5x-4vrf
Record: https://patchnext.com/advisories/cve-2025-3454 (revision 1, source checked 26 Oct 2026, 15:09 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/grafana/grafana 0.0.0-20250424191517-1f707d16ed5d. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/grafana/grafana: affected >= 0.0.0-20210414170620-dadccdda06e6, < 0.0.0-20250424191517-1f707d16ed5d; fixed in 0.0.0-20250424191517-1f707d16ed5d

## Suggested inspection (read-only)
- Go github.com/grafana/grafana: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/grafana/grafana.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-9j65-rv5x-4vrf (GitHub-reviewed advisory GHSA-9j65-rv5x-4vrf lists affected ranges: Go github.com/grafana/grafana >=0.0.0-20210414170620-dadccdda06e6 <0.0.0-20250424191517-1f707d16ed5d)

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