CVE-2026-42151 Vulnerability Analysis & Exploit Details

CVE-2026-42151
Vulnerability Scoring

7.5
/10
Very High Risk

Highly exploitable, CVE-2026-42151 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-42151 Details

Status: Analyzed

Last updated: 🕔 11 May 2026, 17:22 UTC
Originally published on: 🕖 04 May 2026, 19:16 UTC

Time between publication and last update: 6 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVE-2026-42151 Vulnerability Summary

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_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.

Assessing the Risk of CVE-2026-42151

Access Complexity Graph

The exploitability of CVE-2026-42151 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-42151

With low attack complexity and no required privileges, CVE-2026-42151 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-42151, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-42151, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2026-42151 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: None
    CVE-2026-42151 poses no threat to data integrity.
  • Availability: None
    CVE-2026-42151 does not impact system availability.

CVE-2026-42151 References

External References

CWE Common Weakness Enumeration

CWE-312

CAPEC Common Attack Pattern Enumeration and Classification

  • Retrieve Embedded Sensitive Data CAPEC-37 An attacker examines a target system to find sensitive data that has been embedded within it. This information can reveal confidential contents, such as account numbers or individual keys/credentials that can be used as an intermediate step in a larger attack.

Vulnerable Configurations

  • cpe:2.3:a:prometheus:prometheus:2.48.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.48.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.48.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.48.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.48.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.48.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.48.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.48.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.48.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.48.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.49.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.49.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.49.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.49.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.49.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.49.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.49.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.49.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.49.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.49.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.50.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.50.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.50.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.50.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.50.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.50.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.50.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.50.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.51.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.51.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.51.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.51.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.51.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.51.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.51.2:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.51.2:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.52.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.52.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.52.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.52.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.52.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.52.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.2:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.2:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.3:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.3:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.4:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.4:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.53.5:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.53.5:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.54.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.54.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.54.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.54.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.54.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.54.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.54.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.54.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.55.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.55.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.55.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.55.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.55.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.55.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:2.55.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:2.55.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.0.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.0.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.0.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.0.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.0.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.0.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.0.0:beta0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.0.0:beta0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.0.0:beta1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.0.0:beta1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.1.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.1.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.1.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.1.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.1.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.1.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.2.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.2.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.2.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.2.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.2.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.2.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.3.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.3.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.3.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.3.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.3.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.3.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.4.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.4.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.4.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.4.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.5.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.5.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.5.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.5.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.5.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.5.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.6.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.6.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.6.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.6.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.6.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.6.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.7.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.7.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.7.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.7.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.7.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.7.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.7.2:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.7.2:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.7.3:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.7.3:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.8.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.8.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.8.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.8.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.8.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.8.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.9.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.9.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.9.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.9.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.10.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.10.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.10.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.10.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.10.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.10.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.11.0:-:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.11.0:-:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.11.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.11.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:prometheus:prometheus:3.11.2:*:*:*:*:*:*:*
    cpe:2.3:a:prometheus:prometheus:3.11.2:*:*:*:*:*:*:*

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