Is CVE-2026-58172 in the CISA KEV catalog?

No. CVE-2026-58172 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-58172?

CVE-2026-58172 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2026-58172?

CVE-2026-58172 has an EPSS score of 0.41% (33th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-58172?

No published fix for CVE-2026-58172 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-58172

CRITICAL

9.1

CVSS v3

NVD

Description

Ocelot through 24.1.0, fixed in commit f156fd4, contains a security control bypass vulnerability that allows denied clients to circumvent IP-based access restrictions by sending WebSocket upgrade requests. The WebSocket upgrade pipeline branch configured via MapWhen in OcelotPipelineExtensions.cs omits SecurityMiddleware, causing requests from blocked IP addresses to be proxied to downstream services without enforcement of the configured allow/block list.

CWE-288

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.41%probability of exploitation in 30 days

33rdpercentile

Low risk: more likely to be exploited than 33% of all known CVEs.

References

Other references4

Embed a live status badge for CVE-2026-58172

Markdown

[![CVE-2026-58172](https://tridentstack.com/cve/badge/CVE-2026-58172.svg)](https://tridentstack.com/cve/CVE-2026-58172)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-58172"><img src="https://tridentstack.com/cve/badge/CVE-2026-58172.svg" alt="CVE-2026-58172"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-01.