HTTP Request Smuggling Affecting varnish-cache package, versions [,6.0.14)[7.0.0,7.6.3)[7.7.0,7.7.1)
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-VARNISHCACHE-10575116
- published2 Jul 2025
- disclosed13 May 2025
- creditUnknown
Introduced: 13 May 2025
CVE-2025-47905 (opens in a new tab)How to fix?
Upgrade varnish-cache to version 6.0.14, 7.6.3, 7.7.1 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling due to improper handling of CRLF sequences in HTTP/1 requests. An attacker can manipulate the chunk boundaries to cause desynchronization of HTTP request interpretation by inserting crafted CRLF sequences.