diff --git a/packages/orchestrator/pkg/hyperloopserver/handlers/logs.go b/packages/orchestrator/pkg/hyperloopserver/handlers/logs.go
index 8f3b02ed18..965869e325 100644
--- a/packages/orchestrator/pkg/hyperloopserver/handlers/logs.go
+++ b/packages/orchestrator/pkg/hyperloopserver/handlers/logs.go
@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"go.uber.org/zap"
@@ -47,6 +48,13 @@ func (h *APIStore) Logs(c *gin.Context) {
 		return
 	}
 
+	if hasStaleLogTimestamp(payload, sbx.LifecycleStartedAt) {
+		h.sendAPIStoreError(c, http.StatusBadRequest, "Log timestamp predates this sandbox's resume")
+		h.logger.Warn(ctx, "dropping envd log with a stale pre-resume timestamp", logger.WithSandboxID(sbxID))
+
+		return
+	}
+
 	// Overwrite instanceID, envID, and teamID to avoid spoofing
 	payload["instanceID"] = sbxID
 	payload["envID"] = sbx.Runtime.TemplateID
@@ -98,3 +106,28 @@ func (h *APIStore) validatePayloadSandboxID(payload map[string]any, sbxID string
 
 	return nil
 }
+
+// Matches envd's zerolog timestamp format.
+const envdTimestampLayout = time.RFC3339Nano
+
+// Allows normal host/guest clock skew.
+const clockSkewTolerance = time.Minute
+
+// True if timestamp predates resume.
+func hasStaleLogTimestamp(payload map[string]any, lifecycleStart time.Time) bool {
+	if lifecycleStart.IsZero() {
+		return false
+	}
+
+	raw, ok := payload["timestamp"].(string)
+	if !ok {
+		return false
+	}
+
+	ts, err := time.Parse(envdTimestampLayout, raw)
+	if err != nil {
+		return false
+	}
+
+	return ts.Before(lifecycleStart.Add(-clockSkewTolerance))
+}
diff --git a/packages/orchestrator/pkg/hyperloopserver/handlers/logs_test.go b/packages/orchestrator/pkg/hyperloopserver/handlers/logs_test.go
new file mode 100644
index 0000000000..ccc2e51c68
--- /dev/null
+++ b/packages/orchestrator/pkg/hyperloopserver/handlers/logs_test.go
@@ -0,0 +1,102 @@
+//go:build linux
+
+package handlers
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestHasStaleLogTimestamp(t *testing.T) {
+	t.Parallel()
+
+	lifecycleStart, err := time.Parse(envdTimestampLayout, "2026-07-16T10:00:00Z")
+	require.NoError(t, err)
+
+	t.Run("timestamp from the snapshot-restored clock is stale", func(t *testing.T) {
+		t.Parallel()
+
+		payload := map[string]any{"timestamp": "2026-06-09T08:00:00.123456789Z"}
+
+		assert.True(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("timestamp after lifecycle start is not stale", func(t *testing.T) {
+		t.Parallel()
+
+		freshRaw := lifecycleStart.Add(time.Second).Format(envdTimestampLayout)
+		payload := map[string]any{"timestamp": freshRaw}
+
+		assert.False(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("timestamp at lifecycle start is not stale", func(t *testing.T) {
+		t.Parallel()
+
+		payload := map[string]any{"timestamp": lifecycleStart.Format(envdTimestampLayout)}
+
+		assert.False(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("timestamp at the cutoff is not stale", func(t *testing.T) {
+		t.Parallel()
+
+		cutoffRaw := lifecycleStart.Add(-clockSkewTolerance).Format(envdTimestampLayout)
+		payload := map[string]any{"timestamp": cutoffRaw}
+
+		assert.False(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("timestamp within clock-skew tolerance is not stale", func(t *testing.T) {
+		t.Parallel()
+
+		withinToleranceRaw := lifecycleStart.Add(-clockSkewTolerance / 2).Format(envdTimestampLayout)
+		payload := map[string]any{"timestamp": withinToleranceRaw}
+
+		assert.False(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("timestamp past the cutoff is stale", func(t *testing.T) {
+		t.Parallel()
+
+		staleRaw := lifecycleStart.Add(-clockSkewTolerance - time.Second).Format(envdTimestampLayout)
+		payload := map[string]any{"timestamp": staleRaw}
+
+		assert.True(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("zero lifecycle start disables stale detection", func(t *testing.T) {
+		t.Parallel()
+
+		payload := map[string]any{"timestamp": "2026-06-09T08:00:00Z"}
+
+		assert.False(t, hasStaleLogTimestamp(payload, time.Time{}))
+	})
+
+	t.Run("missing timestamp is not stale", func(t *testing.T) {
+		t.Parallel()
+
+		payload := map[string]any{"message": "hello"}
+
+		assert.False(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("non-string timestamp is not stale", func(t *testing.T) {
+		t.Parallel()
+
+		payload := map[string]any{"timestamp": 12345}
+
+		assert.False(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+
+	t.Run("invalid timestamp is not stale", func(t *testing.T) {
+		t.Parallel()
+
+		payload := map[string]any{"timestamp": "not-a-time"}
+
+		assert.False(t, hasStaleLogTimestamp(payload, lifecycleStart))
+	})
+}
diff --git a/packages/orchestrator/pkg/sandbox/sandbox.go b/packages/orchestrator/pkg/sandbox/sandbox.go
index 2d6a33b3e4..d52651a5c2 100644
--- a/packages/orchestrator/pkg/sandbox/sandbox.go
+++ b/packages/orchestrator/pkg/sandbox/sandbox.go
@@ -270,6 +270,9 @@ type Sandbox struct {
 	// every time a new Firecracker VM is started.
 	LifecycleID string
 
+	// Fresh host timestamp marking lifecycle start.
+	LifecycleStartedAt time.Time
+
 	config  cfg.BuilderConfig
 	files   *storage.SandboxFiles
 	cleanup *Cleanup
@@ -599,7 +602,8 @@ func (f *Factory) CreateSandbox(
 	}
 
 	sbx := &Sandbox{
-		LifecycleID: lifecycleID,
+		LifecycleID:        lifecycleID,
+		LifecycleStartedAt: time.Now().UTC(),
 
 		Resources:    resources,
 		Metadata:     metadata,
@@ -1010,7 +1014,8 @@ func (f *Factory) ResumeSandbox(
 	}
 
 	sbx := &Sandbox{
-		LifecycleID: lifecycleID,
+		LifecycleID:        lifecycleID,
+		LifecycleStartedAt: time.Now().UTC(),
 
 		Resources:    resources,
 		Metadata:     metadata,