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curl might erroneously pass on credentials for a first proxy to a second proxy.
This can happen when the following conditions are true:
1. curl is setup to use specific different proxies for different URL schemes 2. the first proxy needs credentials 3. the second proxy uses no credentials 4. while using the first proxy (using say `http://`), curl is asked to follow a redirect to a URL using another scheme (say `https://`), accessed using a second, different, proxy
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade curl | Jun 18, 2026 | May 13, 2026 |
| Debian | — | Upgrade curl | Jul 23, 2026 | Jul 23, 2026 |
| Ibm Aix | — | Apply the fix or workaround for curl_advisory12 | Sep 21, 2026 | Sep 21, 2026 |
| Oracle_linux | — | Upgrade libcurl-develUpgrade curlUpgrade libcurl-minimalUpgrade libcurl | Oct 22, 2026 | May 13, 2026 |
| Redhat_linux | — | Upgrade libcurl-debuginfoUpgrade libcurl-develUpgrade curl-debuginfoUpgrade curlUpgrade curl-debugsourceUpgrade libcurlNo solution existsUpgrade libcurl-minimalUpgrade libcurl-minimal-debuginfo | Jul 17, 2026 | Apr 29, 2026 |
| Rocky_linux | — | Upgrade libcurl-minimalUpgrade libcurl-minimal-debuginfoUpgrade curl-debugsourceUpgrade curl-debuginfoUpgrade curlUpgrade libcurlUpgrade libcurl-debuginfoUpgrade libcurl-devel | Oct 16, 2026 | Oct 15, 2026 |
| Ubuntu | — | Upgrade curlUpgrade libcurl3-nssUpgrade libcurl4Upgrade libcurl4t64Upgrade libcurl3t64-gnutlsUpgrade libcurl3-gnutls | 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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