Known
CVE-2026-28508
HIGH
GHSA-fcrh-fqxh-6fx6
Severity by source
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Lifecycle Timeline
3DescriptionGitHub 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. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Idno versions prior to 1.6.4 with URL unfurl service endpoint accessible without authentication. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Exploitation no authentication required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote attacker without authentication could exploit this vulnerability to force the server to make arbitrary outbound HTTP requests to any host, including. |
| Remediation | Fixed in version 1.6.4.. Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 7 days: Identify all affected systems and apply vendor patches promptly. …
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