{"cve":"CVE-2021-41090","nvd":{"published":"2021-12-08T17:15:11.093","modified":"2026-06-17T04:07:51.260","status":"Modified","description":"Grafana Agent is a telemetry collector for sending metrics, logs, and trace data to the opinionated Grafana observability stack. Prior to versions 0.20.1 and 0.21.2, inline secrets defined within a metrics instance config are exposed in plaintext over two endpoints: metrics instance configs defined in the base YAML file are exposed at `/-/config` and metrics instance configs defined for the scraping service are exposed at `/agent/api/v1/configs/:key`. Inline secrets will be exposed to anyone being able to reach these endpoints. If HTTPS with client authentication is not configured, these endpoints are accessible to unauthenticated users. Secrets found in these sections are used for delivering metrics to a Prometheus Remote Write system, authenticating against a system for discovering Prometheus targets, and authenticating against a system for collecting metrics. This does not apply for non-inlined secrets, such as `*_file` based secrets. This issue is patched in Grafana Agent versions 0.20.1 and 0.21.2. A few workarounds are available. Users who cannot upgrade should use non-inline secrets where possible. Users may also desire to restrict API access to Grafana Agent with some combination of restricting the network interfaces Grafana Agent listens on through `http_listen_address` in the `server` block, configuring Grafana Agent to use HTTPS with client authentication, and/or using firewall rules to restrict external access to Grafana Agent's API.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-312","CWE-200"],"references":["https://github.com/grafana/agent/commit/af7fb01e31fe2d389e5f1c36b399ddc46b412b21","https://github.com/grafana/agent/pull/1152","https://github.com/grafana/agent/releases/tag/v0.20.1","https://github.com/grafana/agent/releases/tag/v0.21.2","https://github.com/grafana/agent/security/advisories/GHSA-9c4x-5hgq-q3wh"],"products":["grafana:agent"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-41090","score":0.0076,"percentile":0.55313,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9c4x-5hgq-q3wh","url":"https://osv.dev/vulnerability/GHSA-9c4x-5hgq-q3wh","summary":"Instance config inline secret exposure in Grafana","modified":"2026-07-08T06:28:55.459191934Z","packages":[{"ecosystem":"Go","name":"github.com/grafana/agent","purl":"pkg:golang/github.com/grafana/agent","ranges":[">=0.14.0 <0.21.2"],"fixed":["0.21.2"]}]},{"id":"GO-2022-0305","url":"https://osv.dev/vulnerability/GO-2022-0305","summary":"Instance config inline secret exposure in Grafana in github.com/grafana/agent","modified":"2026-03-03T04:52:08.075014Z","packages":[{"ecosystem":"Go","name":"github.com/grafana/agent","purl":"pkg:golang/github.com/grafana/agent","ranges":[">=0.14.0 <0.21.2"],"fixed":["0.21.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}