ThreeMammals Ocelot up to 24.1.0 WebSocket Upgrade OcelotPipelineExtensions.cs authentication bypass

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k1.35

Summaryinfo

A vulnerability was found in ThreeMammals Ocelot up to 24.1.0 and classified as critical. This affects an unknown part of the file OcelotPipelineExtensions.cs of the component WebSocket Upgrade Handler. Such manipulation leads to authentication bypass. This vulnerability is uniquely identified as CVE-2026-58172. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in ThreeMammals Ocelot up to 24.1.0 and classified as critical. Affected by this issue is an unknown code of the file OcelotPipelineExtensions.cs of the component WebSocket Upgrade Handler. The manipulation with an unknown input leads to a authentication bypass vulnerability. Using CWE to declare the problem leads to CWE-288. A product requires authentication, but the product has an alternate path or channel that does not require authentication. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed by George Chen as 2403. The advisory is available at github.com. This vulnerability is handled as CVE-2026-58172 since 06/29/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading eliminates this vulnerability. Applying the patch f156fd4017ca25025fffdad8ec56c1d657dfb402 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.1
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authentication bypass
CWE: CWE-288 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Patch: f156fd4017ca25025fffdad8ec56c1d657dfb402

Timelineinfo

06/29/2026 CVE reserved
06/30/2026 +1 days Advisory disclosed
06/30/2026 +0 days VulDB entry created
06/30/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 2403
Researcher: George Chen
Status: Confirmed

CVE: CVE-2026-58172 (🔒)
GCVE (CVE): GCVE-0-2026-58172
GCVE (VulDB): GCVE-100-374882

Entryinfo

Created: 06/30/2026 20:16
Changes: 06/30/2026 20:16 (80)
Complete: 🔍
Cache ID: 216::103

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