diff --git a/app/src/main/java/com/m57/hermescontrol/data/model/PluginInfo.kt b/app/src/main/java/com/m57/hermescontrol/data/model/PluginInfo.kt
index 1e00957e..b6f47a46 100644
--- a/app/src/main/java/com/m57/hermescontrol/data/model/PluginInfo.kt
+++ b/app/src/main/java/com/m57/hermescontrol/data/model/PluginInfo.kt
@@ -81,6 +81,26 @@ data class PluginsHubResponse(
     val providers: PluginsHubProviders? = null,
 )
 
+@Serializable
+data class PluginUpdateRequest(
+    @SerialName("accept_capabilities") val acceptCapabilities: Boolean,
+)
+
+@Serializable
+data class PluginUpdateResult(
+    val ok: Boolean = false,
+    val unchanged: Boolean = false,
+    @SerialName("consent_required") val consentRequired: Boolean = false,
+    val delta: Map<String, List<String>>? = null,
+    @SerialName("delta_lines") val deltaLines: List<String>? = null,
+    val error: String? = null,
+) {
+    val capabilityDelta: List<String>
+        get() =
+            deltaLines?.takeIf { it.isNotEmpty() }
+                ?: delta.orEmpty().map { (surface, added) -> "$surface: ${added.joinToString() }" }
+}
+
 @Serializable
 data class AgentPluginInstallBody(
     val identifier: String = "",
diff --git a/app/src/main/java/com/m57/hermescontrol/data/remote/HermesApiService.kt b/app/src/main/java/com/m57/hermescontrol/data/remote/HermesApiService.kt
index 55e6cddf..c51156a9 100644
--- a/app/src/main/java/com/m57/hermescontrol/data/remote/HermesApiService.kt
+++ b/app/src/main/java/com/m57/hermescontrol/data/remote/HermesApiService.kt
@@ -670,7 +670,8 @@ interface HermesApiService : KanbanApiService {
     @POST("api/dashboard/agent-plugins/{name}/update")
     suspend fun updatePlugin(
         @Path("name", encoded = true) name: String,
-    ): Response<Unit>
+        @Body body: com.m57.hermescontrol.data.model.PluginUpdateRequest,
+    ): Response<com.m57.hermescontrol.data.model.PluginUpdateResult>
 
     @POST("api/dashboard/agent-plugins/{name}/enable")
     suspend fun enablePlugin(
diff --git a/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsScreen.kt b/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsScreen.kt
index 5cbd407a..d691fc92 100644
--- a/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsScreen.kt
+++ b/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsScreen.kt
@@ -13,6 +13,8 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Delete
 import androidx.compose.material.icons.filled.InstallDesktop
@@ -120,6 +122,37 @@ fun PluginsScreen(
 
     ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
+    state.updateConsent?.let { consent ->
+        AlertDialog(
+            onDismissRequest = viewModel::cancelPluginUpdate,
+            title = { Text(stringResource(R.string.plugins_update_consent_title)) },
+            text = {
+                Column(
+                    modifier = Modifier.verticalScroll(rememberScrollState()),
+                    verticalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    Text(stringResource(R.string.plugins_update_consent_text, consent.name))
+                    val lines = consent.result.capabilityDelta
+                    if (lines.isEmpty()) {
+                        Text(consent.result.error ?: stringResource(R.string.plugins_update_consent_missing))
+                    } else {
+                        lines.forEach { Text(it) }
+                    }
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = viewModel::confirmPluginUpdate, enabled = state.rowBusy == null) {
+                    Text(stringResource(R.string.plugins_update_accept))
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = viewModel::cancelPluginUpdate) {
+                    Text(stringResource(R.string.common_cancel))
+                }
+            },
+        )
+    }
+
     // Remove confirmation dialog
     if (state.removeConfirmPlugin != null) {
         AlertDialog(
diff --git a/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsViewModel.kt b/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsViewModel.kt
index 10d50bde..a05daba1 100644
--- a/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsViewModel.kt
+++ b/app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsViewModel.kt
@@ -9,6 +9,8 @@ import com.m57.hermescontrol.data.model.AgentPluginInstallBody
 import com.m57.hermescontrol.data.model.PluginCatalogEntry
 import com.m57.hermescontrol.data.model.PluginInfo
 import com.m57.hermescontrol.data.model.PluginProvidersPutRequest
+import com.m57.hermescontrol.data.model.PluginUpdateRequest
+import com.m57.hermescontrol.data.model.PluginUpdateResult
 import com.m57.hermescontrol.data.model.PluginsHubResponse
 import com.m57.hermescontrol.data.model.ProviderOption
 import com.m57.hermescontrol.data.remote.ApiClient
@@ -33,6 +35,12 @@ enum class PluginsTab {
     CATALOG,
 }
 
+data class PluginUpdateConsent(
+    val name: String,
+    val result: PluginUpdateResult,
+    val scope: DataScope?,
+)
+
 data class PluginsUiState(
     val selectedTab: PluginsTab = PluginsTab.INSTALLED,
     val isLoading: Boolean = false,
@@ -55,6 +63,7 @@ data class PluginsUiState(
     val rowBusy: String? = null,
     // Confirm remove dialog
     val removeConfirmPlugin: String? = null,
+    val updateConsent: PluginUpdateConsent? = null,
     // Rescan
     val rescanBusy: Boolean = false,
     // Catalog state
@@ -99,6 +108,7 @@ class PluginsViewModel(
                 providerBusy = false,
                 rowBusy = null,
                 removeConfirmPlugin = null,
+                updateConsent = null,
                 rescanBusy = false,
             )
         }
@@ -450,23 +460,83 @@ class PluginsViewModel(
     }
 
     fun updatePlugin(name: String) {
-        viewModelScope.launch {
-            setRowBusy(name)
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.updatePlugin(name) }
-                }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update { it.copy(toastMessage = "Plugin updated successfully") }
-                    clearRowBusy(name)
-                    loadPlugins(forceRefresh = true)
-                }
+        if (_uiState.value.updateConsent != null) return
+        performPluginUpdate(name, acceptCapabilities = false)
+    }
 
-                is NetworkResult.Failure -> {
-                    _uiState.update { it.copy(toastMessage = "Failed to update plugin: ${result.error.message}") }
-                    clearRowBusy(name)
+    fun cancelPluginUpdate() {
+        _uiState.update { it.copy(updateConsent = null) }
+    }
+
+    fun confirmPluginUpdate() {
+        val consent = _uiState.value.updateConsent ?: return
+        if (_uiState.value.rowBusy != null) return
+        cancelPluginUpdate()
+        if (consent.scope != runCatching { AuthManager.currentDataScope() }.getOrNull()) return
+        performPluginUpdate(consent.name, acceptCapabilities = true)
+    }
+
+    private fun performPluginUpdate(
+        name: String,
+        acceptCapabilities: Boolean,
+    ) {
+        if (_uiState.value.rowBusy != null) return
+        val generation = scopeGeneration
+        val requestScope = runCatching { AuthManager.currentDataScope() }.getOrNull()
+        val api = ApiClient.hermesApi
+        setRowBusy(name)
+        _uiState.update { it.copy(toastMessage = null) }
+        viewModelScope.launch {
+            try {
+                val result = safeApiCall { api.updatePlugin(name, PluginUpdateRequest(acceptCapabilities)) }
+                if (generation != scopeGeneration ||
+                    requestScope != runCatching { AuthManager.currentDataScope() }.getOrNull()
+                ) {
+                    return@launch
                 }
+                when (result) {
+                    is NetworkResult.Success -> {
+                        val update = result.data
+                        // #1282: HTTP success is not update success; consent must be explicit.
+                        when {
+                            update.consentRequired -> {
+                                _uiState.update {
+                                    it.copy(updateConsent = PluginUpdateConsent(name, update, requestScope))
+                                }
+                            }
+
+                            !update.ok -> {
+                                _uiState.update {
+                                    it.copy(
+                                        toastMessage = "Failed to update plugin: ${update.error ?: "Update refused"}",
+                                    )
+                                }
+                            }
+
+                            else -> {
+                                _uiState.update {
+                                    it.copy(
+                                        toastMessage =
+                                            if (update.unchanged) {
+                                                "Plugin is already up to date"
+                                            } else {
+                                                "Plugin updated successfully"
+                                            },
+                                    )
+                                }
+                                loadPlugins(forceRefresh = true)
+                            }
+                        }
+                    }
+
+                    is NetworkResult.Failure -> {
+                        _uiState.update {
+                            it.copy(toastMessage = "Failed to update plugin: ${result.error.message}")
+                        }
+                    }
+                }
+            } finally {
+                if (generation == scopeGeneration) clearRowBusy(name)
             }
         }
     }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 968d3120..df298c62 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1779,4 +1779,8 @@
     <string name="custom_headers_hide">Hide header values</string>
     <string name="custom_headers_invalid">Use unique HTTP header names and single-line ASCII values. Authorization, Cookie, Host, and connection headers are managed by the app.</string>
     <string name="custom_headers_save_failed">Could not save custom headers. Try again.</string>
+    <string name="plugins_update_consent_title">Review new capabilities</string>
+    <string name="plugins_update_consent_text">Updating %1$s requires the additional capabilities below. Nothing has been installed yet. Accept these capabilities and update?</string>
+    <string name="plugins_update_consent_missing">The server did not provide capability details.</string>
+    <string name="plugins_update_accept">Accept and update</string>
 </resources>
diff --git a/app/src/test/java/com/m57/hermescontrol/ui/plugins/PluginsViewModelTest.kt b/app/src/test/java/com/m57/hermescontrol/ui/plugins/PluginsViewModelTest.kt
index 7c8c759f..92c981d8 100644
--- a/app/src/test/java/com/m57/hermescontrol/ui/plugins/PluginsViewModelTest.kt
+++ b/app/src/test/java/com/m57/hermescontrol/ui/plugins/PluginsViewModelTest.kt
@@ -5,6 +5,8 @@ import com.m57.hermescontrol.data.model.PluginCatalogCapabilities
 import com.m57.hermescontrol.data.model.PluginCatalogEntry
 import com.m57.hermescontrol.data.model.PluginCatalogResponse
 import com.m57.hermescontrol.data.model.PluginInfo
+import com.m57.hermescontrol.data.model.PluginUpdateRequest
+import com.m57.hermescontrol.data.model.PluginUpdateResult
 import com.m57.hermescontrol.data.model.PluginsHubResponse
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.HermesApiService
@@ -72,6 +74,107 @@ class PluginsViewModelTest {
         unmockkAll()
     }
 
+    @Test
+    fun `update waits for consent and only accepts on explicit confirmation`() {
+        coEvery { mockApi.updatePlugin("snyk", PluginUpdateRequest(false)) } returns
+            Response.success(PluginUpdateResult(consentRequired = true, deltaLines = listOf("tools: scan")))
+        coEvery { mockApi.updatePlugin("snyk", PluginUpdateRequest(true)) } returns
+            Response.success(PluginUpdateResult(ok = true))
+        coEvery { mockApi.getPlugins() } returns Response.success(PluginsHubResponse(emptyList()))
+        val viewModel = PluginsViewModel()
+        viewModel.updatePlugin("snyk")
+        viewModel.updatePlugin("snyk")
+        testDispatcher.scheduler.advanceUntilIdle()
+        assertEquals(
+            listOf("tools: scan"),
+            viewModel.uiState.value.updateConsent
+                ?.result
+                ?.capabilityDelta,
+        )
+        assertNull(viewModel.uiState.value.toastMessage)
+        assertNull(viewModel.uiState.value.rowBusy)
+        coVerify(exactly = 0) { mockApi.updatePlugin(any(), PluginUpdateRequest(true)) }
+        coVerify(exactly = 0) { mockApi.getPlugins() }
+        viewModel.confirmPluginUpdate()
+        viewModel.confirmPluginUpdate()
+        testDispatcher.scheduler.advanceUntilIdle()
+        assertNull(viewModel.uiState.value.updateConsent)
+        assertEquals("Plugin updated successfully", viewModel.uiState.value.toastMessage)
+        coVerify(exactly = 1) { mockApi.updatePlugin("snyk", PluginUpdateRequest(false)) }
+        coVerify(exactly = 1) { mockApi.updatePlugin("snyk", PluginUpdateRequest(true)) }
+        coVerify(exactly = 1) { mockApi.getPlugins() }
+    }
+
+    @Test
+    fun `cancel consent never retries the update`() {
+        coEvery { mockApi.updatePlugin(any(), any()) } returns
+            Response.success(PluginUpdateResult(consentRequired = true))
+        val viewModel = PluginsViewModel()
+        viewModel.updatePlugin("snyk")
+        testDispatcher.scheduler.advanceUntilIdle()
+        viewModel.cancelPluginUpdate()
+        viewModel.confirmPluginUpdate()
+        testDispatcher.scheduler.advanceUntilIdle()
+        assertNull(viewModel.uiState.value.updateConsent)
+        assertNull(viewModel.uiState.value.toastMessage)
+        coVerify(exactly = 1) { mockApi.updatePlugin(any(), any()) }
+    }
+
+    @Test
+    fun `ok false is a failure even with HTTP 200 and unchanged true`() {
+        coEvery { mockApi.updatePlugin(any(), any()) } returns
+            Response.success(PluginUpdateResult(unchanged = true, error = "Update refused"))
+        val viewModel = PluginsViewModel()
+        viewModel.updatePlugin("snyk")
+        testDispatcher.scheduler.advanceUntilIdle()
+        assertEquals("Failed to update plugin: Update refused", viewModel.uiState.value.toastMessage)
+        assertNull(viewModel.uiState.value.rowBusy)
+        coVerify(exactly = 0) { mockApi.getPlugins() }
+    }
+
+    @Test
+    fun `unchanged success reports already up to date`() {
+        coEvery { mockApi.updatePlugin(any(), any()) } returns
+            Response.success(PluginUpdateResult(ok = true, unchanged = true))
+        coEvery { mockApi.getPlugins() } returns Response.success(PluginsHubResponse(emptyList()))
+        val viewModel = PluginsViewModel()
+        viewModel.updatePlugin("snyk")
+        testDispatcher.scheduler.advanceUntilIdle()
+        assertEquals("Plugin is already up to date", viewModel.uiState.value.toastMessage)
+        assertNull(viewModel.uiState.value.rowBusy)
+    }
+
+    @Test
+    fun `scope switch discards late update consent`() {
+        val reply = CompletableDeferred<Response<PluginUpdateResult>>()
+        coEvery { mockApi.updatePlugin(any(), any()) } coAnswers { reply.await() }
+        val viewModel = PluginsViewModel()
+        viewModel.updatePlugin("snyk")
+        testDispatcher.scheduler.runCurrent()
+        viewModel.clearScopeOwnedState()
+        reply.complete(Response.success(PluginUpdateResult(consentRequired = true)))
+        testDispatcher.scheduler.advanceUntilIdle()
+        viewModel.confirmPluginUpdate()
+        assertNull(viewModel.uiState.value.updateConsent)
+        assertNull(viewModel.uiState.value.rowBusy)
+        assertNull(viewModel.uiState.value.toastMessage)
+        coVerify(exactly = 1) { mockApi.updatePlugin(any(), any()) }
+    }
+
+    @Test
+    fun `HTTP update failure releases busy state`() {
+        coEvery { mockApi.updatePlugin(any(), any()) } returns Response.error(503, "offline".toResponseBody())
+        val viewModel = PluginsViewModel()
+        viewModel.updatePlugin("snyk")
+        testDispatcher.scheduler.advanceUntilIdle()
+        assertTrue(
+            viewModel.uiState.value.toastMessage!!
+                .contains("Failed to update"),
+        )
+        assertNull(viewModel.uiState.value.rowBusy)
+        coVerify(exactly = 0) { mockApi.getPlugins() }
+    }
+
     @Test
     fun `switch tab to CATALOG automatically triggers catalog load`() {
         coEvery { mockApi.getPluginCatalog() } returns