Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M
CVE-2026-28508Idno: Unauthenticated SSRF via URL Unfurl Endpoint
Critical 9.2
In plain English
A critical-severity server-side request forgery in idno from idno. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | idno/known | 1.6.4 | GHSA-fcrh-fqxh-6fx6 |
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
References
- https://github.com/idno/idno/security/advisories/GHSA-fcrh-fqxh-6fx6 x_refsource_CONFIRM
- https://github.com/idno/idno/releases/tag/1.6.4 x_refsource_MISC