CVE-2026-3784

medium

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.

References

http://www.openwall.com/lists/oss-security/2026/03/11/3

https://www.cisa.gov/news-events/ics-advisories/icsa-26-188-05

https://hackerone.com/reports/3584903

https://curl.se/docs/CVE-2026-3784.json

https://curl.se/docs/CVE-2026-3784.html

https://cert-portal.siemens.com/productcert/html/ssa-253495.html

Details

Source: Mitre, NVD

Published: 2026-03-11

Updated: 2026-06-02

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

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