CVE-2026-3784
Last modified
CVE-2026-3784 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 7.7, < 8.18.0 |
References
- https://curl.se/docs/CVE-2026-3784.htmlPatch, Vendor Advisory
- https://curl.se/docs/CVE-2026-3784.jsonVendor Advisory
- https://hackerone.com/reports/3584903Exploit, Issue Tracking, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/03/11/3Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-3784?
How severe is CVE-2026-3784?
How do I fix CVE-2026-3784?
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-2026-3777The application does not properly validate the lifetime and …7.8
- CVE-2026-3778The application does not detect or guard against cyclic PDF …5.5
- CVE-2026-3779The application's list box calculate array logic keeps stale…7.8
- CVE-2026-3780The application's installer runs with elevated privileges bu…7.8
- CVE-2026-3781The Attendance Manager plugin for WordPress is vulnerable to…5.4
- CVE-2026-3783When an OAuth2 bearer token is used for an HTTP(S) transfer,…5.3
- CVE-2026-3785A vulnerability was identified in EasyCMS up to 1.6. The aff…8.8
- CVE-2026-3786A security flaw has been discovered in EasyCMS up to 1.6. Th…8.8
- CVE-2026-3787A weakness has been identified in UltraVNC 1.6.4.0 on Window…7
- CVE-2026-3788A security vulnerability has been detected in Bytedesk up to…8.8
- CVE-2026-3789A vulnerability was detected in Bytedesk up to 1.3.9. Affect…8.8
- CVE-2026-3790A flaw has been found in SourceCodester Sales and Inventory …8.8
Are you affected by CVE-2026-3784?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST