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CVE-2026-3784
Component Overview
Vulnerability Overview
Name
CVE-2026-3784
Source
NVD (
link
)
Debian (
link
)
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.
CWEs
CWE-305
Published Date
Mar 11, 2026
Updated Date
Jun 17, 2026
Workaround
-
Advisories
https://curl.se/docs/CVE-2026-3784.html
Patch
https://curl.se/docs/CVE-2026-3784.json
Vendor Advisory
https://hackerone.com/reports/3584903
Exploit
http://www.openwall.com/lists/oss-security/2026/03/11/3
Mailing List
Analysis
#
Affected Component
Analysis
curl
Patched
Vulnerability Ratings
#
6.5
CVSSv31
NaN
other
Others affected components
#
Name
Project
Project Version
Version
Status
libcurl
buildroot
2025.02.x
8.20.0
Not Affected
libcurl
buildroot
master
8.21.0
Not Affected
curl
openwrt
master
8.19.0-r2
Not Affected
libcurl-gnutls
openwrt
master
8.20.0-r1
Not Affected
curl
openwrt
openwrt-25.12
8.19.0-r2
Not Affected
libcurl-gnutls
openwrt
openwrt-25.12
8.14.1-r1
Exploitable
curl
yocto
kirkstone
7.82.0
Patched
curl
yocto
master
8.20.0
Not Affected
Resolved with patches
#
curl (yocto:kirkstone)
#
Title
Author
Resolve
1
proxy-auth: additional tests
Stefan Eissing <stefan@eissing.org>
CVE-2026-3784
curl (yocto:scarthgap)
#
Title
Author
Resolve
1
proxy-auth: additional tests
Stefan Eissing <stefan@eissing.org>
CVE-2026-3784