CVE-2026-3784

MEDIUM
2026-03-11 2499f714-1537-4658-8207-48ae4bb9eae9
6.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
PoC Detected
Mar 12, 2026 - 14:09 vuln.today
Public exploit code
Patch Released
Mar 12, 2026 - 14:09 nvd
Patch available
CVE Published
Mar 11, 2026 - 11:16 nvd
MEDIUM 6.5

Tags

Information Disclosure Curl

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.

Analysis

curl's HTTP proxy connection reuse mechanism fails to validate credential changes, allowing an attacker to intercept or manipulate traffic by leveraging an existing proxy connection established with different authentication. This affects users whose applications reuse proxy connections across requests with varying credentials, enabling credential confusion attacks. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

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Priority Score

53
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: +20

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CVE-2026-3784 vulnerability details – vuln.today
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