---
id: CVE-2025-71405
title: >-
  chi versions before v5.2.2 contain an open redirect vulnerability in the
  RedirectSlashes middleware function that uses the Host header to construct
  redirect URLs
summary: >-
  chi versions before v5.2.2 contain an open redirect vulnerability in the
  RedirectSlashes middleware function that uses the Host header to construct
  redirect URLs. Attackers can manipulate the Host header to redirect users to
  arbitrary ho…
severity: medium
cvss: 5.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-601
vendor: go-chi
product: chi
affected:
  - chi < 5.2.2
patched:
  - github.com/go-chi/chi/v5 5.2.2
published: '2026-08-14'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:16:53.587'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-71405'
references:
  - url: 'https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/go-chi-chi-before-open-redirect-via-redirectslashes
    label: disclosure@vulncheck.com
  - url: 'https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://github.com/go-chi/chi/commit/1be7ad938cc9c5b39a9dea01a5c518848928ab65
  - url: 'https://github.com/go-chi/chi'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-71405'
  - url: 'https://github.com/advisories/GHSA-vrw8-fxc6-2r93'
tags:
  - nvd
  - cve.org
  - exploit-available
  - osv
  - go
  - ghsa
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-14T18:57:32.118107Z'
cvssSource: cna
epss: 0.00388
epssPercentile: 0.32758
aliases:
  - GHSA-vrw8-fxc6-2r93
  - GO-2025-3770
ecosystem: go
ingestedAt: '2026-08-15T19:19:53.859Z'
---

## Overview

chi versions before v5.2.2 contain an open redirect vulnerability in the RedirectSlashes middleware function that uses the Host header to construct redirect URLs. Attackers can manipulate the Host header to redirect users to arbitrary hosts, enabling phishing attacks and credential theft.

## Remediation

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

## Package advisory (CVE-2025-71405)

Affected packages:

- `github.com/go-chi/chi/v5 < 5.2.2`

Patched in:

- `github.com/go-chi/chi/v5 5.2.2`

Source: https://osv.dev/vulnerability/GHSA-vrw8-fxc6-2r93