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`.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade curl | Jun 18, 2026 | May 13, 2026 |
| Debian | — | Upgrade curl | Jul 12, 2026 | Jul 12, 2026 |
| Ibm Aix | — | Apply the fix or workaround for curl_advisory12 | Sep 21, 2026 | Sep 21, 2026 |
| Redhat_linux | — | Upgrade libcurl-debuginfoUpgrade libcurlUpgrade libcurl-minimalUpgrade libcurl-develUpgrade curl-debugsourceUpgrade curl-debuginfoUpgrade curlUpgrade libcurl-minimal-debuginfoNo solution exists | Jul 17, 2026 | May 13, 2026 |
| Splunk | — | Upgrade Splunk Enterprise to version 10.4.2Upgrade Splunk Enterprise to version 10.2.6Upgrade Splunk Enterprise to version 10.0.9Upgrade Splunk Enterprise to version 9.4.14 | Aug 20, 2026 | May 13, 2026 |
| Ubuntu | — | Upgrade libcurl3-gnutls (Ubuntu Pro)Upgrade libcurl3-gnutlsUpgrade curl (Ubuntu Pro)Upgrade libcurl4-openssl-dev (Ubuntu Pro)Upgrade libcurl3-nss (Ubuntu Pro)Upgrade libcurl3t64-gnutlsUpgrade libcurl4 (Ubuntu Pro)Upgrade libcurl4-gnutls-dev (Ubuntu Pro)Upgrade curlUpgrade libcurl3-nssUpgrade libcurl4Upgrade libcurl4t64Upgrade libcurl4-nss-dev (Ubuntu Pro) | May 4, 2026 | Apr 29, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 13, 2026 |
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