HTTP Request Smuggling Affecting tinyproxy/tinyproxy package, versions [0,]
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-TINYPROXYTINYPROXY-17660930
- published28 Jun 2026
- disclosed17 Jun 2026
- creditUnknown
Introduced: 17 Jun 2026
CVE-2026-54387 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling via the handling of conflicting Content-Length and Transfer-Encoding headers. An attacker can inject arbitrary HTTP requests to the backend by crafting specially formed HTTP requests that desynchronize the proxy and backend parser state, potentially enabling cache poisoning, access control bypass, and request hijacking.