CVE-2026-3784
wrong proxy connection reuse with credentials
6.5CVSSMEDIUM
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.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:LConfidentialityLow
I:LIntegrityLow
A:NAvailabilityNone
Weaknesses
Affected Products
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 1 more affected products View all →
Exploitability
Official Patch Available
References
https://curl.se/docs/CVE-2026-3784.json
curl.se
https://curl.se/docs/CVE-2026-3784.html
curl.se
https://hackerone.com/reports/3584903
hackerone.com
and 10 more references View all →
Timeline
Published
Mar 11, 2026
Last Updated
Jun 2, 2026
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