CVE-2026-91143
Last modified
CVE-2026-91143 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. 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.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| snail007 | goproxy | <= 15.3 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-91143?
How severe is CVE-2026-91143?
How do I fix CVE-2026-91143?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-91091A vulnerability was identified in GPAC up to f1219cde. The i…4.3
- CVE-2026-9110Inappropriate implementation in UI in Google Chrome on Windo…4.2
- CVE-2026-9111Use after free in WebRTC in Google Chrome on Linux prior to …8.8
- CVE-2026-9112Use after free in GPU in Google Chrome on Windows prior to 1…8.8
- CVE-2026-9113Out of bounds read in GPU in Google Chrome on Mac prior to 1…4.3
- CVE-2026-9114Use after free in QUIC in Google Chrome on prior to 148.0.77…8.8
- CVE-2026-91144ZFile through 5.0.5 fails to validate requested file paths a…7.5
- CVE-2026-91145Activiti through 7.1.0.M6 fails to validate hash-brace defer…7.1
- CVE-2026-91146Takahe through 0.11.0 fails to restrict URL schemes in link …6.1
- CVE-2026-9115Insufficient policy enforcement in Service Worker in Google …4.3
- CVE-2026-9116Insufficient policy enforcement in ServiceWorker in Google C…4.3
- CVE-2026-9117Type Confusion in GFX in Google Chrome on Linux, ChromeOS pr…7.5
Are you affected by CVE-2026-91143?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST