Home/CVE/Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the client_
CVE

CVE-2026-42151

Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the client_

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.

HIGH · CVSS 7.5 EPSS 0.0001
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-312Cleartext Storage of Sensitive Information
▤

Affected Products & Versions

2
prometheus>= 2.48.0 and < 3.5.3
prometheus>= 3.6.0 and < 3.11.3
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/prometheus/prometheus HIGH fixed in 0.311.3
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 May 2026 · 07:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
msrcCVE-2026-42151
suse-csafopenSUSE-SU-2026:10676-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/prometheus/prometheus/pull/18587Issue TrackingPatch
https://github.com/prometheus/prometheus/pull/18590Issue TrackingPatch
https://github.com/prometheus/prometheus/releases/tag/v3.11.3Release Notes
https://github.com/prometheus/prometheus/releases/tag/v3.5.3Release Notes
https://github.com/prometheus/prometheus/security/advisories/GHSA-wg65-39gg-5wfjVendor Advisory
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