Server-Side Request Forgery (SSRF) vulnerability
in Apache HTTP Server on Windows
with AllowEncodedSlashes On and MergeSlashes Off allows to potentially leak NTLM hashes to a malicious server via SSRF and malicious requests or content
Users are recommended to upgrade to version 2.4.66, which fixes the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade apache2 | Dec 8, 2025 | Dec 5, 2025 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | Dec 8, 2025 | Dec 5, 2025 |
| Apple Osx Apache | — | Upgrade macOS to the latest version | Mar 27, 2026 | Mar 24, 2026 |
| Debian | — | Upgrade apache2 | Jan 26, 2026 | Jan 26, 2026 |
| Freebsd | — | Upgrade apache24 | Dec 10, 2025 | Dec 4, 2025 |
| Gentoo Linux | — | Upgrade www-servers/apache. | Aug 16, 2026 | Aug 13, 2026 |
| Ibm Http_server | — | Apply IBM HTTP Server version 9.0.5.27 or laterApply IBM HTTP Server Interim Fix PH68462Apply IBM HTTP Server version 8.5.5.29 or later | Mar 25, 2026 | Dec 15, 2025 |
| Oracle Httpserver | — | Apply patch 39086822 to Oracle HTTP Server 14.1.2.0.0.Apply patch 39073998 to Oracle HTTP Server 12.2.1.4.0. | Sep 30, 2026 | Dec 5, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Dec 5, 2025 |
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