CVE-2026-7168
cross-proxy Digest auth state leak
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`.
INFO
Published Date :
May 13, 2026, 1:01 p.m.
Last Modified :
May 14, 2026, 2:12 p.m.
Remotely Exploit :
Yes !
Source :
2499f714-1537-4658-8207-48ae4bb9eae9
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Clear Proxy-Authorization header before changing proxy host.
- Re-authenticate with the new proxy server.
- Ensure proper header management for proxy authentication.
- Update libcurl to a version with this fix.
Public PoC/Exploit Available at Github
CVE-2026-7168 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-7168.
| URL | Resource |
|---|---|
| https://curl.se/docs/CVE-2026-7168.html | Patch Vendor Advisory |
| https://curl.se/docs/CVE-2026-7168.json | Vendor Advisory |
| https://hackerone.com/reports/3697719 | Exploit Issue Tracking |
| http://www.openwall.com/lists/oss-security/2026/04/29/14 | Mailing List Patch |
| https://hackerone.com/reports/3697719 | Exploit Issue Tracking |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-7168 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-7168
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
RAD Security Image Scanner
Dockerfile Makefile Go
public-inbox mirror of the oss-security mailing list
Shell
None
Shell Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-7168 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-7168 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-294 Added CPE Configuration OR *cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* versions from (including) 7.12.0 up to (excluding) 8.20.0 Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/04/29/14 Types: Mailing List, Patch Added Reference Type curl: https://curl.se/docs/CVE-2026-7168.html Types: Patch, Vendor Advisory Added Reference Type curl: https://curl.se/docs/CVE-2026-7168.json Types: Vendor Advisory Added Reference Type CISA-ADP: https://hackerone.com/reports/3697719 Types: Exploit, Issue Tracking Added Reference Type curl: https://hackerone.com/reports/3697719 Types: Exploit, Issue Tracking -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added Reference https://hackerone.com/reports/3697719 -
New CVE Received by 2499f714-1537-4658-8207-48ae4bb9eae9
May. 13, 2026
Action Type Old Value New Value Added 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`. Added Reference https://curl.se/docs/CVE-2026-7168.html Added Reference https://curl.se/docs/CVE-2026-7168.json Added Reference https://hackerone.com/reports/3697719 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 13, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/04/29/14