1. A cookie is set using the `secure` keyword for `https://target` 2. curl is redirected to or otherwise made to speak with `http://target` (same hostname, but using clear text HTTP) using the same cookie set 3. The same cookie name is set - but with only a slash as path (`path="/"`). Since this site is not secure, the cookie *should* be ignored. 4. A bug in the path comparison logic makes curl read outside a heap buffer boundary
The bug either causes a crash or it potentially makes the comparison come to the wrong conclusion and lets the clear-text site override the contents of the secure cookie, contrary to expectations and depending on the memory contents immediately following the single-byte allocation that holds the path.
The presumed and correct behavior would be to plainly ignore the second set of the cookie since it was already set as secure on a secure host so overriding it on an insecure host should not be okay.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libcurl-minimalUpgrade curlUpgrade libcurl-develUpgrade libcurlUpgrade curl-minimal | Dec 23, 2025 | Dec 16, 2025 |
| Alpine Linux | — | Upgrade curl | Oct 7, 2025 | Sep 12, 2025 |
| Amazon Linux Ami 2 | — | Upgrade libcurl-develUpgrade libcurlUpgrade curl-debuginfoUpgrade curl | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade curl-minimalUpgrade libcurl-minimal-debuginfoUpgrade libcurl-minimalUpgrade curlUpgrade libcurl-develUpgrade curl-debugsourceUpgrade libcurl-debuginfoUpgrade curl-debuginfoUpgrade curl-minimal-debuginfoUpgrade libcurl | Jan 12, 2026 | Sep 12, 2025 |
| Apple Osx Curl | — | Upgrade macOS to the latest version | Dec 15, 2025 | Dec 12, 2025 |
| Debian | — | Upgrade curl | Jan 6, 2026 | Jan 6, 2026 |
| Dell Powerstore Dsa2026115 | — | Upgrade Dell PowerStoreOS to the latest version | Feb 25, 2026 | Feb 24, 2026 |
| Huawei Euleros 2_0_sp10 | — | Upgrade curlUpgrade libcurl | Nov 12, 2025 | Nov 6, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade curlUpgrade libcurl | Dec 12, 2025 | Nov 6, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade libcurlUpgrade curl | Nov 12, 2025 | Nov 6, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade libcurlUpgrade curl | Nov 21, 2025 | Nov 6, 2025 |
| Ibm Aix | — | Apply the fix or workaround for curl_advisory8 | Feb 25, 2026 | Dec 10, 2025 |
| Nutanix Ahv | — | Upgrade Nutanix AHV to the latest version | Jun 5, 2026 | Mar 26, 2026 |
| Oracle_linux | — | Upgrade libcurl-develUpgrade curlUpgrade libcurl-minimalUpgrade libcurlUpgrade curl-minimal | Dec 22, 2025 | Sep 12, 2025 |
| Redhat_linux | — | Upgrade curl-debugsourceNo solution existsUpgrade curl-debuginfoUpgrade curl-minimal-debuginfoUpgrade libcurl-debuginfoUpgrade curl-minimalUpgrade libcurlUpgrade curlUpgrade libcurl-develUpgrade libcurl-minimal-debuginfoUpgrade libcurl-minimal | Dec 12, 2025 | Sep 12, 2025 |
| Rocky_linux | — | Upgrade libcurlUpgrade libcurl-debuginfoUpgrade curl-minimalUpgrade libcurl-develUpgrade libcurl-minimalUpgrade curlUpgrade curl-minimal-debuginfoUpgrade curl-debugsourceUpgrade curl-debuginfoUpgrade libcurl-minimal-debuginfo | Feb 2, 2026 | Jan 30, 2026 |
| Suse | — | Upgrade libcurl4Upgrade libcurl-develUpgrade libcurl-devel-32bitUpgrade curlUpgrade libcurl4-32bit | Dec 5, 2025 | Sep 11, 2025 |
| Ubuntu | — | Upgrade libcurl3-gnutlsUpgrade libcurl4-gnutls-devUpgrade libcurl3t64-gnutlsUpgrade libcurl3-nssUpgrade curlUpgrade libcurl4-nss-devUpgrade libcurl4Upgrade libcurl4-openssl-devUpgrade libcurl4t64 | Feb 26, 2026 | Feb 25, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Sep 12, 2025 |
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