🛡️ CVE-2026-25779 — gitea

🟡 CVSS 6.1 — Medium ✅ No Known Exploit NVD
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Gitea: Open Redirect via redirect_to

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

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

Affected software

CVE-2026-25779 is recorded against 3 packages.

  • code.gitea.io/gitea
  • github.com/go-gitea/gitea
  • unknown

Timeline and source

Published on 25 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Advisory)

Details

Severity Medium
CVSS Score 6.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-06-25
Updated 2026-08-12
Modified 2026-06-25
Fix URL N/A

Affected Packages

Software From version Fixed in
code.gitea.io/gitea — —
github.com/go-gitea/gitea — —
unknown — —

Similar Threats

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