diff --git a/cmd/checkconfig/testdata/combined.yaml b/cmd/checkconfig/testdata/combined.yaml
index 274255248b..eaeb60f29f 100644
--- a/cmd/checkconfig/testdata/combined.yaml
+++ b/cmd/checkconfig/testdata/combined.yaml
@@ -23,6 +23,10 @@ deck:
           - (FAIL|Failure \[)\b
           - panic\b
           - ^E\d{4} \d\d:\d\d:\d\d\.\d\d\d]
+          iframe_sandbox_permissions:
+          - allow-scripts
+          - allow-popups
+          - allow-popups-to-escape-sandbox
       required_files:
       - build-log.txt
     - lens:
diff --git a/cmd/deck/template/spyglass.html b/cmd/deck/template/spyglass.html
index 7909812b12..ef9e7cfba4 100644
--- a/cmd/deck/template/spyglass.html
+++ b/cmd/deck/template/spyglass.html
@@ -43,7 +43,7 @@
     <div class="mdl-card__title lens-title"><h3 class="mdl-card__title-text">{{$config.Title}}</h3></div>
     <div id="{{$config.Name}}-view-container" class="lens-view-content mdl-card__supporting-text">
       <img src="/static/kubernetes-wheel.svg?v={{deckVersion}}" alt="loading spinner" class="loading-spinner is-active lens-card-loading" id="{{$config.Name}}-loading">
-      <iframe class="lens-container" style="visibility: hidden;" id="iframe-{{$index}}" sandbox="allow-scripts allow-top-navigation allow-popups allow-same-origin" data-lens-index="{{$index}}" data-lens-name="{{$config.Name}}"{{if $config.HideTitle}} data-hide-title="true"{{end}}></iframe>
+      <iframe class="lens-container" style="visibility: hidden;" id="iframe-{{$index}}" sandbox="{{$config.IframeSandboxPermissions}}" data-lens-index="{{$index}}" data-lens-name="{{$config.Name}}"{{if $config.HideTitle}} data-hide-title="true"{{end}}></iframe>
     </div>
   </div>
   {{end}}
diff --git a/pkg/spyglass/lenses/buildlog/lens.go b/pkg/spyglass/lenses/buildlog/lens.go
index c0c5e7ef0b..9d65a716b1 100644
--- a/pkg/spyglass/lenses/buildlog/lens.go
+++ b/pkg/spyglass/lenses/buildlog/lens.go
@@ -50,10 +50,11 @@ const (
 var defaultHighlightLineLengthMax = 10000 // Default maximum length of a line worth highlighting
 
 type config struct {
-	HighlightRegexes   []string         `json:"highlight_regexes"`
-	HideRawLog         bool             `json:"hide_raw_log,omitempty"`
-	Highlighter        *highlightConfig `json:"highlighter,omitempty"`
-	HighlightLengthMax *int             `json:"highlight_line_length_max,omitempty"`
+	HighlightRegexes         []string         `json:"highlight_regexes"`
+	HideRawLog               bool             `json:"hide_raw_log,omitempty"`
+	Highlighter              *highlightConfig `json:"highlighter,omitempty"`
+	HighlightLengthMax       *int             `json:"highlight_line_length_max,omitempty"`
+	IframeSandboxPermissions []string         `json:"iframe_sandbox_permissions,omitempty"`
 }
 
 type highlightConfig struct {
@@ -68,10 +69,11 @@ type highlightConfig struct {
 }
 
 type parsedConfig struct {
-	highlightRegex     *regexp.Regexp
-	showRawLog         bool
-	highlighter        *highlightConfig
-	highlightLengthMax int
+	highlightRegex           *regexp.Regexp
+	showRawLog               bool
+	highlighter              *highlightConfig
+	highlightLengthMax       int
+	IframeSandboxPermissions string
 }
 
 var _ api.Lens = Lens{}
@@ -97,6 +99,17 @@ func (lens Lens) Header(artifacts []api.Artifact, resourceDir string, config jso
 // It is only used if highlight_regexes is not specified in the lens config.
 var defaultErrRE = regexp.MustCompile(`timed out|ERROR:|(FAIL|Failure \[)\b|panic\b|^E\d{4} \d\d:\d\d:\d\d\.\d\d\d]`)
 
+// defaultSandboxPermissions is the default value for iframe_sandbox_permissions lense config if it is not specified.
+var defaultSandboxPermissions = strings.Join(
+	[]string{
+		"allow-scripts",
+		"allow-top-navigation",
+		"allow-popups",
+		"allow-same-origin",
+	},
+	" ",
+)
+
 func init() {
 	lenses.RegisterLens(Lens{})
 }
@@ -170,8 +183,9 @@ type buildLogsView struct {
 
 func getConfig(rawConfig json.RawMessage) parsedConfig {
 	conf := parsedConfig{
-		highlightRegex: defaultErrRE,
-		showRawLog:     true,
+		highlightRegex:           defaultErrRE,
+		showRawLog:               true,
+		IframeSandboxPermissions: defaultSandboxPermissions,
 	}
 
 	// No config at all is fine.
@@ -189,6 +203,13 @@ func getConfig(rawConfig json.RawMessage) parsedConfig {
 		conf.highlighter = nil
 	}
 	conf.showRawLog = !c.HideRawLog
+
+	if c.IframeSandboxPermissions == nil {
+		conf.IframeSandboxPermissions = defaultSandboxPermissions
+	} else {
+		conf.IframeSandboxPermissions = strings.Join(c.IframeSandboxPermissions, " ")
+	}
+
 	if len(c.HighlightRegexes) == 0 {
 		return conf
 	}
diff --git a/pkg/spyglass/lenses/buildlog/lens_test.go b/pkg/spyglass/lenses/buildlog/lens_test.go
index b745e2c55d..f5351cf429 100644
--- a/pkg/spyglass/lenses/buildlog/lens_test.go
+++ b/pkg/spyglass/lenses/buildlog/lens_test.go
@@ -34,7 +34,8 @@ import (
 
 func TestGetConfig(t *testing.T) {
 	def := parsedConfig{
-		showRawLog: true,
+		showRawLog:               true,
+		IframeSandboxPermissions: defaultSandboxPermissions,
 	}
 	cases := []struct {
 		name string
@@ -61,6 +62,14 @@ func TestGetConfig(t *testing.T) {
 				}
 				return d
 			}(),
+		}, {
+			name: "configure iframe sandbox permissions",
+			raw:  `{"iframe_sandbox_permissions": ["allow-scripts", "allow-downloads"]}`,
+			want: func() parsedConfig {
+				d := def
+				d.IframeSandboxPermissions = "allow-scripts allow-downloads"
+				return d
+			}(),
 		},
 	}