Description (CNA)
Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, the SSE event server's Access-Control-Allow-Origin response header was hardcoded to the wildcard * regardless of the caller's Origin. Because EventSource does not preflight and does not send cookies, the wildcard is sufficient to let any third-party page the developer visits open a cross-origin EventSource to the SSE port and read the live filename stream from JavaScript. This vulnerability is fixed in 1.17.7.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| xyproto / algernon | affected < 1.17.7 |
CWE
CWE-942
References
ADP enrichment
No English description supplied.