cvedb.io
CVE-2025-49812
HIGH · CVSS 7.4
EPSS exploitation probability: 0%
Published 2025-07-10T17:15:48.193 · Last modified 2026-06-17T09:31:56.917

Summary

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

apache — http_server

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.