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NVD Vulnerability Details :
CVE-2026-3784
Analyzed
More InfoOfficial Page
Source-2499f714-1537-4658-8207-48ae4bb9eae9
View Known Exploited Vulnerability (KEV) details
Published At-11 Mar, 2026 | 11:16
Updated At-12 Mar, 2026 | 14:09

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CPE Matches
CURL
haxx
>>curl>>Versions from 7.7(inclusive) to 8.18.0(exclusive)
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-305Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-305
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://curl.se/docs/CVE-2026-3784.html2499f714-1537-4658-8207-48ae4bb9eae9
Patch
Vendor Advisory
https://curl.se/docs/CVE-2026-3784.json2499f714-1537-4658-8207-48ae4bb9eae9
Vendor Advisory
https://hackerone.com/reports/35849032499f714-1537-4658-8207-48ae4bb9eae9
Exploit
Issue Tracking
Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/03/11/3af854a3a-2127-422b-91ae-364da2661108
Mailing List
Third Party Advisory
Hyperlink: https://curl.se/docs/CVE-2026-3784.html
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
Resource:
Patch
Vendor Advisory
Hyperlink: https://curl.se/docs/CVE-2026-3784.json
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
Resource:
Vendor Advisory
Hyperlink: https://hackerone.com/reports/3584903
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
Resource:
Exploit
Issue Tracking
Third Party Advisory
Hyperlink: http://www.openwall.com/lists/oss-security/2026/03/11/3
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Mailing List
Third Party Advisory
Change History
0Changes found
Details not found