---
id: CVE-2023-26735
title: >-
  blackbox_exporter v0.23.0 was discovered to contain an access control issue in
  its probe interface
summary: >-
  blackbox_exporter v0.23.0 was discovered to contain an access control issue in
  its probe interface. This vulnerability allows attackers to detect intranet
  ports and services, as well as download resources. NOTE: this is disputed by
  third…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-918
  - CWE-918
vendor: prometheus
product: blackbox_exporter
affected:
  - blackbox_exporter = 0.23.0
published: '2023-04-26'
updated: '2026-07-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-26735'
references:
  - url: >-
      https://github.com/prometheus/blackbox_exporter#tls-and-basic-authentication
    label: cve@mitre.org
  - url: 'https://github.com/prometheus/blackbox_exporter/issues/1024'
    label: cve@mitre.org
  - url: 'https://github.com/prometheus/blackbox_exporter/issues/1025'
    label: cve@mitre.org
  - url: 'https://github.com/prometheus/blackbox_exporter/issues/1026'
    label: cve@mitre.org
  - url: 'http://blackboxexporter.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://prometheus.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/prometheus/blackbox_exporter#tls-and-basic-authentication
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/prometheus/blackbox_exporter/issues/1024'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/prometheus/blackbox_exporter/issues/1025'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/prometheus/blackbox_exporter/issues/1026'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/prometheus/blackbox_exporter#tls-and-basic-authentication
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.0089
epssPercentile: 0.57607
ingestedAt: '2026-07-04T20:57:37.114Z'
---

## Overview

blackbox_exporter v0.23.0 was discovered to contain an access control issue in its probe interface. This vulnerability allows attackers to detect intranet ports and services, as well as download resources. NOTE: this is disputed by third parties because authentication can be configured.

## Affected

- `blackbox_exporter = 0.23.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.