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CVE-2026-8926— password leak with netrc and user in URL

Quick assessment

Affected
curl curl
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

curl是瑞典cURL团队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存在信任管理问题漏洞，该漏洞源于使用.netrc文件查找凭据且同时指定用户名无密码的URL时，可能错误获取并使用.netrc文件中为该主机设置的其他用户密码。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.44% · P39

Possible ATT&CK Techniques 1 AI

T1552.005 · Cloud Instance Metadata API

Affected Version Matrix 16

VendorProduct Version RangeStatus
curl curl 8.11.1< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.20.1 affected
e9b9bbac22c26cf67316fa8e6c6b9e831af31949< 4ae1d7cc2643e4773a136395f12bc02fc6867854 affected
8.20.0 affected
8.19.0 affected
8.18.0 affected
8.17.0 affected
… +8 more rows
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I. Basic Information for CVE-2026-8926

Vulnerability Information
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Vulnerability Title
password leak with netrc and user in URL
Source: CVE Program / CVE List V5
Vulnerability Description
When asking curl to use a `.netrc` file to find credentials and at the same time specifying a URL with a username (without a password), like `https://user@example.com/`, curl could wrongly get and use the password for *another* user set in the `.netrc` file for that host if such a one exists and there is no match for the specified user.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
curl 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是瑞典cURL团队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存在信任管理问题漏洞，该漏洞源于使用.netrc文件查找凭据且同时指定用户名无密码的URL时，可能错误获取并使用.netrc文件中为该主机设置的其他用户密码。
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

Vendor Product Affected Versions CPE Subscribe
curl curl 8.11.1 ~ 8.14.2 -
curl curl e9b9bbac22c26cf67316fa8e6c6b9e831af31949 ~ 4ae1d7cc2643e4773a136395f12bc02fc6867854 -
curl curl 8.20.0 -

II. Public POCs for CVE-2026-8926

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III. Intelligence Information for CVE-2026-8926

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Vendor Advisories for CVE-2026-8926 (3)

Same Patch Batch · curl · 2026-07-03 · 18 CVEs total

CVE-2026-9546 sending old referer
CVE-2026-8932 incomplete mTLS config matching in conn reuse
CVE-2026-8458 wrong reuse for different services
CVE-2026-8925 SASL double-free
CVE-2026-8286 wrong STARTTLS connection reuse
CVE-2026-8927 env-set cross-proxy Digest auth state leak
CVE-2026-8924 trailing dot domain super cookie
CVE-2026-12064 proto-default skips SSH verification
CVE-2026-10536 HTTP/2 stream-dependency tree UAF
CVE-2026-11352 QUIC zero-length UDP datagrams busy-loop
CVE-2026-9545 exposing HTTP/3 early data
CVE-2026-9080 UAF after pause in socket callback
CVE-2026-9547 SSH improper host validation
CVE-2026-9079 stale proxy password leak
CVE-2026-11564 Native CA trust persist
CVE-2026-11856 cross-origin Digest auth state leak
CVE-2026-11586 WS Auto-PONG memory exhaustion

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl
Same weakness: CWE-522