Callback-url-file-3a-2f-2f-2fproc-2fself-2fenviron

callback-url-file:///proc/self/environ

In secure systems, this string should never appear in any legitimate traffic. Treat it as what it is: a direct attack on your application’s confidentiality. callback-url-file-3A-2F-2F-2Fproc-2Fself-2Fenviron

Investigate immediately, patch the vulnerable endpoint, and rotate all secrets that may have lived in /proc/self/environ at the time of the request. callback-url-file:///proc/self/environ In secure systems

Thus, the full decoded path is: