PT-2026-50585 · Go · Github.Com/Go-Gitea/Gitea

Publicado

2026-06-17

·

Atualizado

2026-06-17

·

CVE-2026-25779

CVSS v4.0

5.1

Média

VetorAV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Details

Despite the validation within urlIsRelative in modules/httplib/url.go, an open redirect is still possible due to usage of directory traversal sequences plus a back-slash in the "redirect to" parameter.

PoC

When a user uses this URL to login:
https://gitea.com/user/login?redirect to=/a/../example.com
They would be redirected to example.com upon a successful login to their gitea account.

Impact

  • Phishing: Attackers can use trusted domain links to redirect victims to credential-harvesting pages
  • OAuth/SSO Token Theft: In authentication flows, authorization codes or tokens may leak via redirect
  • Referer Leakage: Sensitive URL parameters may be exposed to attacker domains via the Referer header
  • Cache Poisoning: In deployments with shared caches, malicious redirects may be cached and served to other users

Correção

Open Redirect

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Enumeração de Fraquezas

CWE-601

Identificadores relacionados

CVE-2026-25779
GHSA-J5R2-4C8J-XC3M

Produtos afetados

Github.Com/Go-Gitea/Gitea