Full Report
Grafana security advisory (AV26-860)
Analysis Summary
# Vulnerability: Grafana Alloy Sensitive Information Disclosure
## CVE Details
- **CVE ID:** CVE-2026-75889 (Note: Referenced as CVE-2026-19516 in advisory text; confirmed as 75889 via official record link)
- **CVSS Score:** Pending/Not yet assigned (Estimated Medium/High based on information disclosure)
- **CWE:** CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)
## Affected Systems
- **Products:** Grafana Alloy (The open-source distribution of the OpenTelemetry Collector)
- **Versions:** All versions prior to and including **1.18.1**
- **Configurations:** Systems utilizing Alloy for telemetry collection where sensitive configuration data or environment variables are processed.
## Vulnerability Description
This vulnerability involves an information disclosure flaw within Grafana Alloy. Technical details indicate that under specific conditions, the application may expose sensitive information (such as credentials, API keys, or internal configuration details) that should remain restricted. This typically occurs through logs, error messages, or monitoring endpoints that do not properly redact sensitive telemetry metadata.
## Exploitation
- **Status:** Not exploited in the wild (based on current advisory status); No public PoC currently identified.
- **Complexity:** Low to Medium
- **Attack Vector:** Network (typically requires access to the monitoring/metrics interface or log output).
## Impact
- **Confidentiality:** High (Risk of exposing secrets/credentials)
- **Integrity:** None
- **Availability:** None
## Remediation
### Patches
Grafana Labs has addressed this issue in subsequent releases. Users are strongly advised to upgrade to the latest stable version of Alloy:
- **Upgrade to Grafana Alloy v1.19.0 or higher.**
### Workarounds
- Restrict access to Alloy’s HTTP API and UI endpoints to trusted internal networks only.
- Implement strict RBAC (Role-Based Access Control) for users viewing logs or metrics produced by Alloy.
- Review configuration files to ensure sensitive environment variables are not being explicitly logged.
## Detection
- **Indicators of Compromise:** Unusual access patterns to Alloy's `/metrics` or `/debug` endpoints from unauthorized IP addresses.
- **Detection methods:** Audit log files for the presence of plaintext credentials or sensitive tokens that should have been redacted.
## References
- Grafana Security Tags: hxxps[://]grafana[.]com/tags/security/
- CVE Record: hxxps[://]www[.]cve[.]org/CVERecord?id=CVE-2026-75889
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/grafana-security-advisory-av26-860