CVE•Published 2026-03-11•Modified 2026-06-02•0 articles on news•6 live references•NVD data

CVE-2026-3784Haxx · Curl

Vulnerability data via NVD (ingested)

CVSS v3.1

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS percentile

Exploit Prediction Scoring System · top 94% of all CVEs

Weaknesses (CWE)

CWE-305Authentication Bypass by Primary Weakness

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.

Timeline

Published 2026-03-11

Modified 2026-06-02

External references

NVD MITRE Exploit-DB Sploitus trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-3784

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Haxx Curl"

All exposed Haxx Curl instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Curl"

HTTP body or banner mentions "Curl" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-3784