🛡️ CVE-2026-28508
🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-918 NVD
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Idno is a social publishing platform. Prior to version 1.6.4, a logic error in the API authentication flow causes the CSRF protection on the URL unfurl service endpoint to be trivially bypassed by any unauthenticated remote attacker. Combined with the absence of a login requirement on the endpoint itself, this allows an attacker to force the server to make arbitrary outbound HTTP requests to any host, including internal network addresses and cloud instance metadata services, and retrieve the response content. This issue has been patched in version 1.6.4.

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE CWE-918
Public Exploit ✅ No
Source NVD
Published 2026-03-02
Updated 2026-06-02
Modified 2026-03-06
Fix URL N/A

Affected Packages

Software From version Fixed in
idno/known — 1.6.4
known — 1.6.4

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