CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2026-42151
High (7.5) in prometheus prometheus. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/prometheus/prometheus 0.311.3.
Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the client_secret field in the Azure AD remote write OAuth configuration (storage/remote/azuread) was typed as string instead of Secret. Prometheus redacts fields of type Secret when serving the configuration via the /-/config HTTP API endpoint. Because the field was a plain string, the Azure OAuth client secret was exposed in plaintext to any user or process with access to that endpoint. This issue has been patched in versions 3.5.3 and 3.11.3.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-200, CWE-312, CWE-256
- Published
- Modified
- Record from
- the NVD, synced
Affected
- prometheus:prometheus
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wg65-39gg-5wfj | Go | github.com/prometheus/prometheus | >=0.45.2 <0.311.3 | 0.311.3 |
| GO-2026-5710 | Go | github.com/prometheus/prometheus | >=0.45.2 <0.311.3 | 0.311.3 |
References
- https://github.com/prometheus/prometheus/pull/18587
- https://github.com/prometheus/prometheus/pull/18590
- https://github.com/prometheus/prometheus/releases/tag/v3.11.3
- https://github.com/prometheus/prometheus/releases/tag/v3.5.3
- https://github.com/prometheus/prometheus/security/advisories/GHSA-wg65-39gg-5wfj