CVE-2026-91143
goproxy through 15.3 Authentication Bypass via CONNECT
CVSS 4.0 6.9 MEDIUMCVSS 3.1 7.2 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-91143
Publishedgoproxy 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.
Read the publisher's advisoryAffected versions, risk and source history
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CVE-2026-91143 · CVE overview and exploitation status
cve-program · CVE-2026-91143
- https://github.com/geo-chen/oss/blob/main/goproxy.md
- https://github.com/snail007/goproxy/blob/v15.3/utils/structs.go
- https://github.com/snail007/goproxy/blob/v15.3/services/http.go
- https://github.com/snail007/goproxy
- https://www.vulncheck.com/advisories/goproxy-through-15.3-authentication-bypass-via-connect
Related changes
Linked by CVE identifierNo related changes are available here.