Vulnerabilities CVE-2026-58172

CVE-2026-58172

Critical

Open

TLP:CLEAR

Ocelot - IP Allow/Block List Bypass for WebSocket Upgrade Requests

NVD CVE.org

Critical Infrastructure

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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.

Details

CVSS Score: 9.1
EPSS Score ⓘ: 0.41%

34.1th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Confidence: 90%
Published: Jun 30, 2026
Last Modified: Jul 14, 2026

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