Authentication Bypass Affecting tinyproxy package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.38% (31st percentile)

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  • Snyk IDSNYK-DEBIAN12-TINYPROXY-17375111
  • published18 Jun 2026
  • disclosed17 Jun 2026

Introduced: 17 Jun 2026

CVE-2026-55202  (opens in a new tab)
CWE-290  (opens in a new tab)

How to fix?

There is no fixed version for Debian:12 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:12 relevant fixed versions and status.

Tinyproxy through 1.11.3, fixed in commit 09312a1, fails to properly validate the Host header during stathost detection, allowing unauthenticated attackers to access the stats page by injecting a matching Host header or bypass detection via port manipulation. Remote attackers can trigger unauthorized access to internal proxy statistics or misroute requests as transparent proxy connections to circumvent access controls.

CVSS Base Scores

version 3.1