CVE-2026-71280

HIGH 8.5

go-shiori Server-Side Request Forgery via Unrestricted Bookmark URL Fetch

CVSS Score

8.5

EPSS Score

0.0%

EPSS Percentile

0th

go-shiori's DownloadBookmark() (internal/core/download.go) fetches a caller-supplied bookmark URL using a plain http.Client with no custom DialContext or destination-IP validation (no IsLoopback(), IsPrivate(), IsUnspecified(), or IsLinkLocalUnicast() checks). An authenticated user creating or updating a bookmark via POST /api/bookmark, PUT /api/v1/bookmarks/cache, or POST /api/bookmarks/ext can supply a loopback (127.0.0.1) or 0.0.0.0 (which Linux redirects to loopback) URL, causing the server to make outbound requests to internal-only services, cloud metadata endpoints, or other network-restricted resources.

CWE	CWE-918
Vendor	go-shiori
Product	shiori
Published	Aug 5, 2026
Last Updated	Aug 5, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

go-shiori / shiori

0 ≤ *

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/go-shiori/shiori github.com: https://github.com/go-shiori/shiori/blob/master/internal/core/download.go

Credits

Alibek Baxtiyorov