CVE-2026-7168

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`.

CVSS Vector

References

• https://curl.se/docs/CVE-2026-7168.html
• https://curl.se/docs/CVE-2026-7168.json
• https://hackerone.com/reports/3697719
• http://www.openwall.com/lists/oss-security/2026/04/29/14
• https://hackerone.com/reports/3697719