CVE-2023-26735

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2023-04-26. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
55.4%
KEV
Not listed

Published

April 26, 2023

Last Modified

July 9, 2026

Advisory Details (5)

Auto-updated Jul 4, 2026
No patch confirmed yet.
generic

A fatal error that can ssrf · Issue #1026 · prometheus/blackbox_exporter · GitHub

https://github.com/prometheus/blackbox_exporter/issues/1026
generic

a fatal bug that can Arbitrary file upload · Issue #1025 · prometheus/blackbox_exporter · GitHub

https://github.com/prometheus/blackbox_exporter/issues/1025
generic

a fatal bug that can Unauthorized access to the system · Issue #1024 · prometheus/blackbox_exporter · GitHub

https://github.com/prometheus/blackbox_exporter/issues/1024
generic

GitHub - prometheus/blackbox_exporter: Blackbox prober exporter · GitHub

https://github.com/prometheus/blackbox_exporter#tls-and-basic-authentication
generic

Prometheus

http://prometheus.com

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/prometheus/blackbox_exporter—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 108 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
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  3. 2026-07-23 02:20 UTCEG score recompute
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Frequently asked(5)

What is CVE-2023-26735?
CVE-2023-26735 is a high vulnerability published on April 26, 2023. 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.
When was CVE-2023-26735 disclosed?
CVE-2023-26735 was first published in the National Vulnerability Database on April 26, 2023, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-26735 actively exploited?
CVE-2023-26735 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 55.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-26735?
CVE-2023-26735 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2023-26735?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-26735, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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