CVE-2023-26735Public exploitNetwork attack vector

Internal resource access via caller-selected probe targets

Published Apr 25, 2023 · Updated Jul 9, 2026

SSRF in Prometheus Blackbox Exporter 0.23.0 allows remote attackers to probe internal services and retrieve resources through the /probe endpoint. The handler accepts a caller-supplied target and directs a configured HTTP, DNS, TCP, ICMP, or gRPC module to contact that destination. The behavior is reachable when the endpoint is network-accessible without basic authentication; upstream documentation presents caller-selected targets as intended functionality.

CVSS severity7.5
High
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Prometheus Blackbox Exporter 0.23.0 allows remote attackers to probe internal services and retrieve resources through the /probe endpoint. The handler accepts a caller-supplied target and directs a configured HTTP, DNS, TCP, ICMP, or gRPC module to contact that destination. The behavior is reachable when the endpoint is network-accessible without basic authentication; upstream documentation presents caller-selected targets as intended functionality.

The record

CVE
CVE-2023-26735
Published
Apr 25, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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