Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then changing the origin to a different one (`hostB`) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the `Authorization:` header field meant for `hostA`, to `hostB`.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade curl | Jul 6, 2026 | Jul 3, 2026 |
| Ibm Aix | — | Apply the fix or workaround for curl_advisory11 | Jul 28, 2026 | Jul 28, 2026 |
| Redhat_linux | — | No solution existsUpgrade libcurl-debuginfoUpgrade libcurlUpgrade libcurl-minimal-debuginfoUpgrade curl-debuginfoUpgrade curl-debugsourceUpgrade curlUpgrade libcurl-develUpgrade libcurl-minimal | Jul 17, 2026 | Jul 3, 2026 |
| Ubuntu | — | Upgrade libcurl3-gnutlsUpgrade curl (Ubuntu Pro)Upgrade libcurl4-openssl-devUpgrade libcurl4-nss-devUpgrade libcurl3t64-gnutlsUpgrade libcurl4 (Ubuntu Pro)Upgrade curlUpgrade libcurl4t64Upgrade libcurl4-gnutls-dev (Ubuntu Pro)Upgrade libcurl4-nss-dev (Ubuntu Pro)Upgrade libcurl3-nssUpgrade libcurl3-nss (Ubuntu Pro)Upgrade libcurl4-openssl-dev (Ubuntu Pro)Upgrade libcurl3-gnutls (Ubuntu Pro)Upgrade libcurl4-gnutls-devUpgrade libcurl4Upgrade libcurl3 (Ubuntu Pro) | Aug 20, 2026 | Aug 19, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 13, 2026 | Jul 3, 2026 |
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