Information disclosure in prometheus - CVE-2026-42151
Published: April 28, 2026
Vulnerability identifier: #VU128367
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-42151
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Prometheus
Affected software:
prometheus
prometheus
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to exposure of sensitive information in the /-/config HTTP API endpoint when serving the Azure AD remote write OAuth configuration. A remote attacker can access the endpoint to disclose sensitive information.
Only deployments using Azure AD remote write with OAuth authentication are affected.
How to mitigate CVE-2026-42151
Install security update from vendor's website.