---
id: CVE-2026-12049
title: Open redirect in pgAdmin 4's multi-factor authentication flow
summary: >-
  Open redirect in pgAdmin 4's multi-factor authentication flow. The MFA
  validate and register endpoints honoured the user-supplied 'next' query/form
  parameter without confirming the target pointed back inside pgAdmin, so an
  authenticated …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-601
vendor: pgadmin
product: pgadmin_4
affected:
  - 'pgadmin_4 >= 6.0, < 9.16'
patched:
  - pgadmin_4 9.16
published: '2026-06-19'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-12049'
references:
  - url: >-
      https://github.com/pgadmin-org/pgadmin4/commit/fff6a481854b07822c2b54e8181e6a9076d204cd
    label: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
  - url: 'https://github.com/pgadmin-org/pgadmin4/issues/10028'
    label: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
tags:
  - nvd
epss: 0.00382
epssPercentile: 0.29495
ingestedAt: '2026-06-29T15:48:27.684Z'
---

## Overview

Open redirect in pgAdmin 4's multi-factor authentication flow. The MFA validate and register endpoints honoured the user-supplied 'next' query/form parameter without confirming the target pointed back inside pgAdmin, so an authenticated victim who clicked /mfa/validate?next=<external> -- a link typically delivered by phishing -- would be sent to an attacker-controlled host directly out of the trusted auth flow.

The defect is a trusted-domain redirect, not a privilege bypass: the attacker gains no read/write access to pgAdmin or the victim's database, but the redirect launders the attacker's destination through pgAdmin's URL, which raises the success rate of credential-phishing follow-on against the victim.

Fix introduces a same-origin _is_safe_redirect_url helper and gates every MFA redirect that consumes user-supplied 'next' values through it. The helper allows only relative paths and absolute URLs whose scheme is http(s) and whose host matches the current request host; it rejects external hosts in absolute and protocol-relative form, non-http schemes (javascript:, data:, mailto:), userinfo tricks (http://localhost@attacker/), and backslash variants that some browsers normalize to forward slashes. Unsafe targets fall back to the internal browser index. A dedicated regression test exercises each accept/reject category and the original reporter PoC.

This issue affects pgAdmin 4: from 6.0 before 9.16.

## Affected

- `pgadmin_4 >= 6.0, < 9.16`

## Remediation

Upgrade past the affected range:

- `pgadmin_4 9.16`