HTTP Request Smuggling Affecting apache/httpd package, versions [, 2.4.64-rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-APACHEHTTPD-11426544
- published3 Aug 2025
- disclosed14 Jul 2025
- creditRobert Merget, Nurullah Erinola, Marcel Maehren, Lukas Knittel, Sven Hebrok, Marcus Brinkmann, Juraj Somorovsky, Jörg Schwenk
Introduced: 14 Jul 2025
CVE-2025-49812 (opens in a new tab)How to fix?
Upgrade apache/httpd to version 2.4.64-rc1 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling via the SSLEngine, when TLS upgrades are enabled. An attacker in a man-in-the-middle position can intercept and take control of active HTTP sessions during the TLS upgrade negotiation.
Note: This is only exploitable if the server is configured with SSLEngine optional to permit opportunistic TLS upgrades.