---
id: CVE-2026-55202
title: Tinyproxy - Stathost Detection Bypass via Host Header Manipulation
summary: >-
  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 …
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-290
vendor: tinyproxy
product: tinyproxy
affected:
  - tinyproxy <= 1.11.3
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-06-23T02:03:31.233580Z'
published: '2026-06-17'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T21:15:45.574Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-55202'
references:
  - url: 'https://github.com/tinyproxy/tinyproxy/pull/606'
    label: Pull Request
  - url: >-
      https://github.com/tinyproxy/tinyproxy/commit/09312a185ae25cc486b4ff5987638a7917a48bce
    label: Patch Commit
  - url: >-
      https://www.vulncheck.com/advisories/tinyproxy-stathost-detection-bypass-via-host-header-manipulation
    label: >-
      VulnCheck Advisory: Tinyproxy - Stathost Detection Bypass via Host Header
      Manipulation
tags:
  - cve.org
epss: 0.00381
epssPercentile: 0.32149
ingestedAt: '2026-11-03T08:39:35.555Z'
---

## Overview

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.

## Affected

- `tinyproxy <= 1.11.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.