HTTP Request Smuggling Affecting tinyproxy package, versions *


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.44% (36th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-TINYPROXY-17375102
  • published18 Jun 2026
  • disclosed17 Jun 2026

Introduced: 17 Jun 2026

CVE-2026-54388  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable tinyproxy.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tinyproxy package and not the tinyproxy package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

Tinyproxy through 1.11.3, fixed in commit 364cdb6, fails to reject requests containing multiple Content-Length headers with differing values, forwarding all duplicate headers to the backend while using the first value to determine how many request body bytes to consume. Remote attackers can desynchronize the proxy and backend parser state, allowing injection of arbitrary HTTP requests to the backend to enable cache poisoning, access control bypass, and request hijacking.

CVSS Base Scores

version 3.1