CVE-2026-58172 | Ocelot through 24.1.0, fixed in commit f156fd4, contains a s… | CVSS 9.1 CRITICAL

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.

Metadata

CVE ID: CVE-2026-58172
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-29 16:03 UTC
Published: 2026-06-30 15:54 UTC
Last updated: 2026-06-30 15:54 UTC
Primary CWE: CWE-288
Authentication Bypass Using an Alternate Path or Channel
Vendor / Product: ThreeMammals / Ocelot
Sources: cve.org · NVD

Severity & Metrics

9.1 CRITICAL CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
ThreeMammals	Ocelot	—	0 ≤ 24.1.0, f156fd4017ca25025fffdad8ec56c1d657dfb402

Weakness (CWE)

CWE	Source	Description
CWE-288	cna	Authentication Bypass Using an Alternate Path or Channel

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
9.1	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References (4)