CVE-2026-91143 — goproxy through 15.3 Authentication Bypass via CONNECT
goproxy through 15.3 fails to apply HTTP proxy basic authentication to CONNECT tunnel requests, allowing unauthenticated clients to bypass credential requirements. Attackers can…
Published: 2026-09-14 · CVSS: 6.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7