Not rated
CVE-2025-49812 In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows…
Description
In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade. Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache HTTP Server 2.4 | earliest → 2.4.63 | No fix stated |
Other CVEs of Apache HTTP Server
The 139 CVEs of Apache HTTP Server →
CVE-2026-63686
A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all…
Not rated
CVE-2026-93546
Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write…
Not rated
CVE-2026-79768
Path equivalence: '/./' (single dot directory) vulnerability in Apache HTTP Server's mod_userdir module when…
Not rated
CVE-2026-73637
Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows…
Not rated