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bdu:2026-02143

EUVD-2026-268872

fkie_cve-2026-25242

Gogs is an open source self-hosted Git service. Versions 0.13.4 and below expose unauthenticated file upload endpoints by default. When the global RequireSigninView setting is disabled (default), any remote user can upload arbitrary files to the server via /releases/attachments and /issues/attachments. This enables the instance to be abused as a public file host, potentially leading to disk exhaustion, content hosting, or delivery of malware. CSRF tokens do not mitigate this attack due to same-origin cookie issuance. This issue has been fixed in version 0.14.1.

GHSA-fc3h-92p8-h36f — Unauthenticated File Upload in Gogs

Affected: Go: gogs.io/gogs

Security Advisory:Unauthenticated File Upload in Gogs Vulnerability Type: Unauthenticated File Upload Date: Aug 5, 2025 Discoverer: OpenAI Security Research

## Summary Gogs exposes unauthenticated file upload endpoints by default. When the global RequireSigninView setting is disabled (default), any remote user can upload arbitrary files to the server via /releases/attachments and /issues/attachments. This enables the instance to be abused as a public file host, potentially leading to disk exhaustion, content hosting, or delivery of malware. CSRF tokens do not mitigate this attack due to same-origin cookie issuance.

## Affected Versions

- Software: [Gogs](https://github.com/gogs/gogs/tree/main) - Confirmed Version(s): 28f83626d4ed0aa7b89493be2ea8b79ca038331e - Likely Affected: All versions since 2020-04-05 with unauthenticated attachments endpoints - Introduced Commit: 07818d5fa

## Vulnerability Details The web.go router exposes the following endpoints under the ignSignIn route group:

### Vulnerable Code Snippet ``` m.Post("/issues/attachments", repo.UploadIssueAttachment) m.Post("/releases/attachments", repo.UploadReleaseAttachment) ``` These endpoints are accessible by unauthenticated users if the configuration variable RequireSigninView is false (default). This allows arbitrary file uploads to data/attachments, returning a UUID in response.

While CSRF protection is enabled, attackers can obtain a valid token anonymously from the site and use it in the upload request…

WID-SEC-W-2026-0423 — Gogs: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Gogs ausnutzen, um Dateien zu manipulieren, Sicherheitsmaßnahmen zu umgehen oder Administratorrechte zu erlangen.