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Curl CVE-2026-3784

MEDIUM
Authentication Bypass by Primary Weakness (CWE-305)
2026-03-11 2499f714-1537-4658-8207-48ae4bb9eae9
Information Disclosure Curl
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SUSE
MEDIUM
qualitative
Red Hat
6.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

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

DescriptionCVE.org

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.

AnalysisAI

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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Vulnerability AssessmentAI

Risk Assessment CVSS 6.5 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker could exploit this vulnerability to compromise the affected system.
Remediation A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

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

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
Container suse/ltss/sle12.5/sles12sp5:8.5.210 Affected
Container suse/manager/4.3/proxy-httpd:4.3.16.2.9.73.25 Container suse/manager/4.3/proxy-salt-broker:4.3.16.2.9.63.26 Container suse/sle-micro/base-5.5:2.0.4-5.8.252 Image SLES15-SP5-Micro-5-5 Image SLES15-SP5-Micro-5-5-Azure Image SLES15-SP5-SAP-Azure-LI-BYOS Image SLES15-SP5-SAP-Azure-LI-BYOS-Production Image SLES15-SP5-SAP-Azure-VLI-BYOS Image SLES15-SP5-SAP-Azure-VLI-BYOS-Production Affected
Container suse/manager/5.0/x86_64/proxy-httpd:latest Container suse/manager/5.0/x86_64/proxy-salt-broker:latest Container suse/manager/5.0/x86_64/server:latest Image SLES15-SP6-SAP-Azure-LI-BYOS Image SLES15-SP6-SAP-Azure-LI-BYOS-Production Image SLES15-SP6-SAP-Azure-VLI-BYOS Image SLES15-SP6-SAP-Azure-VLI-BYOS-Production Affected
Container suse/manager/5.0/x86_64/server-hub-xmlrpc-api:latest Container suse/manager/5.0/x86_64/server-migration-14-16:latest Affected
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.140 Affected

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CVE-2026-3784 vulnerability details – vuln.today
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