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CVE-2026-6429— netrc credential leak with reused proxy connection

AI Predicted 6.5 Difficulty: Moderate EPSS 0.03% · P8

Possible ATT&CK Techniques 1AI

T1005 · Data from Local System

Affected Version Matrix 158

VendorProductVersion RangeStatus
curlcurl8.19.0≤ 8.19.0affected
8.18.0≤ 8.18.0affected
8.17.0≤ 8.17.0affected
8.16.0≤ 8.16.0affected
8.15.0≤ 8.15.0affected
8.14.1≤ 8.14.1affected
8.14.0≤ 8.14.0affected
8.13.0≤ 8.13.0affected
… +150 more rows
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I. Basic Information for CVE-2026-6429

Vulnerability Information
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Vulnerability Title
netrc credential leak with reused proxy connection
Source: NVD (National Vulnerability Database)
Vulnerability Description
When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, libcurl could leak the password used for the first host to the followed-to host under certain circumstances.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
curl 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是cURL开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl存在安全漏洞，该漏洞源于.netrc文件凭证和HTTP重定向处理不当，可能导致密码泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
curlcurl 8.19.0 ~ 8.19.0 -

II. Public POCs for CVE-2026-6429

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III. Intelligence Information for CVE-2026-6429

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Same Patch Batch · curl · 2026-05-13 · 8 CVEs total

CVE-2026-7168cross-proxy Digest auth state leak
CVE-2026-7009OCSP stapling bypass with Apple SecTrust
CVE-2026-6253proxy credentials leak over redirect-to proxy
CVE-2026-6276stale custom cookie host causes cookie leak
CVE-2026-4873connection reuse ignores TLS requirement
CVE-2026-5545wrong reuse of HTTP Negotiate connection
CVE-2026-5773wrong reuse of SMB connection

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl

V. Comments for CVE-2026-6429

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