CVE-2026-12049— pgAdmin 4: Open redirect in multi-factor authentication flow via unvalidated 'next' parameter

pgAdmin 4: Open redirect in multi-factor authentication flow via unvalidated 'next' parameter

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

指向未可信站点的URL重定向(开放重定向)

pgAdmin 4 输入验证错误漏洞

pgadmin 4是pgAdmin组织开源的一款数据库管理工具。 pgAdmin 4 6.0版本至9.16之前版本存在输入验证错误漏洞，该漏洞源于多因素身份验证流程中对用户提供的'next'参数验证不足，可能导致开放重定向，使已认证用户通过钓鱼链接被重定向到攻击者控制的站点，增加凭据钓鱼成功率。以下版本受到影响：6.0版本至9.16之前版本。

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