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Prometheus CVE-2023-26735

HIGH
Server-Side Request Forgery (SSRF) (CWE-918)
2023-04-26 cve@mitre.org
7.5
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service URL allowlisting, SSRF prevention
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Credential Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.95%.

Exploit ScenarioDerived

A remote attacker could make the server perform requests to unintended internal or external resources by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.9% exploitation probability (EPSS)

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AnalysisAI

blackbox_exporter v0.23.0 was discovered to contain an access control issue in its probe interface. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. 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 products include: Prometheus Blackbox Exporter.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionNVD

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.

Threat Intelligence Overview

EPSS Score
0.9%
Top 43% exploitable
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.9%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.

Affected Products (CPE)NVD

cpe:2.3:a:prometheus:blackbox_exporter:0.23.0:*:*:*:*:*:*:*
CVE-2022-46146 HIGH POC
8.8 Nov 29

Prometheus Exporter Toolkit is a utility package to build exporters. Rated high severity (CVSS 8.8), this vulnerability

CVE-2026-24892 HIGH POC
7.5 Feb 20

Unsafe PHP deserialization in openITCOCKPIT Community Edition 5.3.1 and earlier allows authenticated attackers to inject

CVE-2026-24891 HIGH POC
7.5 Feb 20

Remote code execution in openITCOCKPIT 5.3.1 and earlier via unsafe deserialization in the Gearman worker component, whi

CVE-2026-42154 HIGH POC
7.5 May 04

Memory exhaustion in Prometheus remote read endpoint allows unauthenticated attackers to crash the monitoring server via

CVE-2026-42151 HIGH POC
7.5 May 04

Prometheus monitoring system exposes Azure AD OAuth client secrets in plaintext via its /-/config HTTP API endpoint. Ver

CVE-2021-29622 MEDIUM POC
6.1 May 19

Prometheus is an open-source monitoring system and time series database. Rated medium severity (CVSS 6.1), this vulnerab

CVE-2020-16248 MEDIUM POC
5.8 Aug 09

Prometheus Blackbox Exporter through 0.17.0 allows /probe?target= SSRF. Rated medium severity (CVSS 5.8), this vulnerabi

CVE-2026-26069 HIGH
7.5 Feb 12

Scraparr versions 3.0.0-beta through 3.0.1 expose Readarr API keys in plaintext through the /metrics endpoint when the R

CVE-2026-0528 MEDIUM
6.5 Jan 13

Denial of Service in Prometheus and Kibana metricsets can be triggered by sending specially crafted malformed payloads t

CVE-2026-119566 MEDIUM
6.3 Oct 30

Prometheus through 3.15.1 can expose Azure AD or Google IAM bearer tokens when remote_write follows an HTTP 3xx redirect

CVE-2019-3826 MEDIUM
6.1 Mar 26

A stored, DOM based, cross-site scripting (XSS) flaw was found in Prometheus before version 2.7.1. Rated medium severity

CVE-2023-40577 MEDIUM
5.4 Aug 25

Alertmanager handles alerts sent by client applications such as the Prometheus server. Rated medium severity (CVSS 5.4),

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