Cloudflare captcha endless loop

I'm seeing the same thing even with no extensions installed - at first I thought it may be an issue with NVIDIA cards (driver issue?), but it's also happening on my Snapdragon powered laptop with Adreno GPU so I've ruled that out:

    "error": "600010",
    "errorInfo": {
      "description": "An unexpected error occurred with the security check.",
      "family": "unknown",
      "retryable": true,
      "severity": "medium",
      "title": "Security Check Failed",
      "userAction": "Try refreshing the page. If the problem continues, copy your Session ID (shown above) and contact support.",
      "originalCode": "600010"
    },
    "errorFamily": "Unknown",
    "errorTime": "2026-10-27T18:17:34.546Z",
    "timeTakenMs": 6385
  },
  "extensionInterference": {
    "hasInterference": false,
    "detectedSignals": [],
    "allResults": {
      "canvasNoise": {
        "detected": false,
        "signal": "canvasNoise",
        "info": {
          "description": "Something is adding random noise to canvas data, making your browser appear suspicious.",
          "howToFix": "Disable or whitelist this site in your canvas-blocking extension.",
          "id": "canvas_noise",
          "likelyExtensions": [
            "Canvas Defender",
            "Canvas Fingerprint Defender",
            "CanvasBlocker",
            "Privacy Badger (strict mode)",
            "Trace"
          ],
          "name": "Canvas Randomization Detected",
          "severity": "high",
          "shortDescription": "Canvas data is being randomized"
        }
      },
      "webglSpoofed": {
        "detected": false,
        "signal": "webglSpoofed",
        "vendor": "Google Inc. (NVIDIA)",
        "renderer": "ANGLE (NVIDIA, NVIDIA RTX A1000 6GB Laptop GPU (0x000025BC) Direct3D11 vs_5_0 ps_5_0, D3D11)",
        "info": {
          "description": "Your graphics card information looks masked or spoofed, which makes your browser appear suspicious.",
          "howToFix": "Disable WebGL spoofing in your privacy extension settings.",
          "id": "webgl_spoofed",
          "likelyExtensions": [
            "WebGL Fingerprint Defender",
            "Privacy Badger",
            "Chameleon",
            "Random User-Agent",
            "Trace"
          ],
          "name": "Graphics Information Appears Fake",
          "severity": "high",
          "shortDescription": "WebGL renderer info is spoofed"
        }
      },
      "braveShields": {
        "detected": false
      }
    }

I’m experiencing the same issue.
I’ve tried the following:

1. Using incognito mode → No effect
2. Clearing cookies → No effect
3. Using a new profile → No effect

I have no other methods left to test.

At the end of my testing, I noticed a few issues, but I’m not sure whether they’re the root cause.

{
  "extensionInterference": {
    "hasInterference": false,
    "detectedSignals": [],
    "allResults": {
      "canvasNoise": {
        "detected": false,
        "signal": "canvasNoise",
        "info": {
          "description": "Something is adding random noise to canvas data, making your browser appear suspicious.",
          "howToFix": "Disable or whitelist this site in your canvas-blocking extension.",
          "id": "canvas_noise",
          "likelyExtensions": [
            "Canvas Defender",
            "Canvas Fingerprint Defender",
            "CanvasBlocker",
            "Privacy Badger (strict mode)",
            "Trace"
          ],
          "name": "Canvas Randomization Detected",
          "severity": "high",
          "shortDescription": "Canvas data is being randomized"
        }
      },
      "webglSpoofed": {
        "detected": false,
        "signal": "webglSpoofed",
        "vendor": "Google Inc. (NVIDIA)",
        "renderer": "ANGLE (NVIDIA, NVIDIA GeForce RTX 3060 Laptop GPU (0x00002520) Direct3D11 vs_5_0 ps_5_0, D3D11)",
        "info": {
          "description": "Your graphics card information looks masked or spoofed, which makes your browser appear suspicious.",
          "howToFix": "Disable WebGL spoofing in your privacy extension settings.",
          "id": "webgl_spoofed",
          "likelyExtensions": [
            "WebGL Fingerprint Defender",
            "Privacy Badger",
            "Chameleon",
            "Random User-Agent",
            "Trace"
          ],
          "name": "Graphics Information Appears Fake",
          "severity": "high",
          "shortDescription": "WebGL renderer info is spoofed"
        }
      },
      "braveShields": {
        "detected": false
      }
    }
  },
  "testMetadata": {
    "startTime": 1793097334376,
    "testsRun": 4,
    "testsFailed": 0,
    "criticalFailure": "turnstile_failed_checks_passed",
    "turnstileCaptureTimedOut": true,
    "durationMs": 4643
  }
}

I'm having this problem in Edge Stable version 156.0.4314.42, but not in InPrivate tabs. I suspected one of my plugins, but even if I completely disable plugins for the web page I'm trying to load it doesn't work. I have to open an InPrivate window now to visit any page using this type of checkbox captcha from Cloudflare. It just started very recently so I'm guessing it corresponds to an update. 

Your Stable-versus-Dev comparison is useful evidence of a channel-specific difference, but it does not establish the cause of Cloudflare error 600010. Keep Stable available for normal access while testing Dev. Update Dev to its latest available build, restart it, and repeat the same test on the same device and network. Then compare a new Dev profile or an InPrivate window, checking whether extensions have been allowed in InPrivate; that setting means InPrivate is not automatically an extension-free test. Record whether the result changes, without disabling browser security protections or trying to bypass the challenge. Submit feedback from the affected Dev browser through Help and feedback, including both browser versions, the error, timestamp, and reproducible steps. Also notify the site operator if the issue affects their service. I cannot confirm an official Microsoft fix or interpret this Cloudflare-specific error from the information provided.