API Authentication Flaw in Idno Social Publishing Platform
CVE-2026-28508

9.2CRITICAL

Key Information:

Vendor

Idno

Status
Idno
Vendor
CVE Published:
6 March 2026

What is CVE-2026-28508?

The Idno Social Publishing Platform contains a critical logic error in its API authentication flow. This flaw allows unauthenticated remote attackers to bypass CSRF protection on the URL unfurl service endpoint, which does not require a login. Consequently, attackers can force the server to make arbitrary outbound HTTP requests to any host, including internal addresses and cloud metadata services, potentially exposing sensitive information. This vulnerability was addressed in version 1.6.4.

Affected Version(s)

idno < 1.6.4

References

https://github.com/idno/idno/security/advisories/GHSA-fcr...
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https://github.com/idno/idno/releases/tag/1.6.4
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CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.