What is the CVSS score of CVE-2026-28508?

CVE-2026-28508 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N. EPSS exploitation probability: 0.2%.

Which versions of Known are affected by CVE-2026-28508?

Organizations using Idno face significant risk from CVE-2026-28508, a server-side request forgery vulnerability rated CVSS 8.6.. A patch is available.

How to fix or mitigate CVE-2026-28508?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Implement egress filtering and URL validation for server-side requests.

Known CVE-2026-28508

HIGH

Server-Side Request Forgery (SSRF) (CWE-918)

2026-03-06 security-advisories@github.com

GHSA-fcrh-fqxh-6fx6

CSRF SSRF Known Withknown

8.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.6 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 06, 2026 - 05:16 nvd

HIGH 8.6

DescriptionGitHub Advisory

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.

AnalysisAI

Idno prior to version 1.6.4 contains an authentication bypass in the URL unfurl API endpoint that allows unauthenticated attackers to trigger arbitrary outbound HTTP requests from the server. An attacker can exploit this to access internal network addresses and cloud metadata services, potentially exposing sensitive configuration and credentials. No patch is currently available for affected installations.

Technical ContextAI

This vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) exists in the requirement on the component. 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 res