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CVE-2026-7168— cross-proxy Digest auth state leak

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，该漏洞源于代理认证头传递错误，可能导致第一个代理的Proxy-Authorization头被错误传递给第二个代理。

AI Predicted 6.5 Difficulty: Easy EPSS 0.47% · P39

Possible ATT&CK Techniques 2 AI

T1043 T1557.002 · ARP Cache Poisoning

Affected Version Matrix 165

VendorProduct Version RangeStatus
curl curl 8.19.0≤ 8.19.0 affected
8.18.0≤ 8.18.0 affected
8.17.0≤ 8.17.0 affected
8.16.0≤ 8.16.0 affected
8.15.0≤ 8.15.0 affected
8.14.1≤ 8.14.1 affected
8.14.0≤ 8.14.0 affected
8.13.0≤ 8.13.0 affected
… +157 more rows
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I. Basic Information for CVE-2026-7168

Vulnerability Information
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Vulnerability Title
cross-proxy Digest auth state leak
Source: CVE Program / CVE List V5
Vulnerability Description
Successfully using libcurl to do a transfer over a specific HTTP proxy (`proxyA`) with **Digest** authentication and then changing the proxy host to a second one (`proxyB`) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the `Proxy-Authorization:` header field meant for `proxyA`, to `proxyB`.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于代理认证头传递错误，可能导致第一个代理的Proxy-Authorization头被错误传递给第二个代理。
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 8.19.0 ~ 8.19.0 -

II. Public POCs for CVE-2026-7168

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III. Intelligence Information for CVE-2026-7168

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Vendor Advisories for CVE-2026-7168 (2)

Other References for CVE-2026-7168 (1)

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

CVE-2026-7009 OCSP stapling bypass with Apple SecTrust
CVE-2026-6253 proxy credentials leak over redirect-to proxy
CVE-2026-6429 netrc credential leak with reused proxy connection
CVE-2026-6276 stale custom cookie host causes cookie leak
CVE-2026-4873 connection reuse ignores TLS requirement
CVE-2026-5545 wrong reuse of HTTP Negotiate connection
CVE-2026-5773 wrong reuse of SMB connection

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl

V. Comments for CVE-2026-7168

Anonymous User
2026-06-11 18:27:19

1

Anonymous User
2026-06-12 14:08:14

1

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