goproxy through 15.3 fails to apply HTTP proxy basic authentication to CONNECT tunnel requests, allowing unauthenticated clients to bypass credential requirements. Attackers can issue CONNECT requests to establish tunnels through the authenticated proxy without providing credentials, enabling arbitrary TCP traffic relay and access to restricted destinations.
History

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Snail007
Snail007 goproxy
Vendors & Products Snail007
Snail007 goproxy

Tue, 15 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 14 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Description goproxy through 15.3 fails to apply HTTP proxy basic authentication to CONNECT tunnel requests, allowing unauthenticated clients to bypass credential requirements. Attackers can issue CONNECT requests to establish tunnels through the authenticated proxy without providing credentials, enabling arbitrary TCP traffic relay and access to restricted destinations.
Title goproxy through 15.3 Authentication Bypass via CONNECT
First Time appeared Goproxy Project
Goproxy Project goproxy
Weaknesses CWE-288
CPEs cpe:2.3:a:goproxy_project:goproxy:*:*:*:*:*:*:*:*
Vendors & Products Goproxy Project
Goproxy Project goproxy
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-14T21:45:43.908Z

Updated: 2026-09-24T14:22:10.409Z

Reserved: 2026-09-14T20:35:39.074Z

Link: CVE-2026-91143

cve-icon Vulnrichment

Updated: 2026-09-15T19:12:10.259Z

cve-icon NVD

Status : Deferred

Published: 2026-09-14T22:16:58.880

Modified: 2026-09-23T17:17:47.747

Link: CVE-2026-91143

cve-icon Redhat

No data.