CVE-2026-7168

Published: May 13, 2026Modified: Jun 17, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitability: 3.9 / Impact: 1.4

Source: NVD

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`.

Affected (1)

Products: Haxx: Curl

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Haxx Curl	From 7.12.0 to 8.20.0

Related CWEs

Authentication Bypass by Capture-replay

A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).

References (5)

https://curl.se/docs/CVE-2026-7168.html

Source: 2499f714-1537-4658-8207-48ae4bb9eae9

PatchVendor Advisory

https://curl.se/docs/CVE-2026-7168.json

Source: 2499f714-1537-4658-8207-48ae4bb9eae9

Vendor Advisory

https://hackerone.com/reports/3697719

Source: 2499f714-1537-4658-8207-48ae4bb9eae9

ExploitIssue Tracking

http://www.openwall.com/lists/oss-security/2026/04/29/14

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListPatch

https://hackerone.com/reports/3697719

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitIssue Tracking

Timeline

No history available yet.