diff --git a/codex-rs/exec/src/event_processor_with_human_output.rs b/codex-rs/exec/src/event_processor_with_human_output.rs
index a667cdd53d7d..c4c18d155d2c 100644
--- a/codex-rs/exec/src/event_processor_with_human_output.rs
+++ b/codex-rs/exec/src/event_processor_with_human_output.rs
@@ -217,6 +217,7 @@ impl EventProcessor for EventProcessorWithHumanOutput {
         const VERSION: &str = env!("CARGO_PKG_VERSION");
         eprintln!("OpenAI Codex v{VERSION}\n--------");
         for (key, value) in config_summary_entries(config, session_configured_event) {
+            let value = sanitize_config_summary_value(&value);
             eprintln!("{} {}", format!("{key}:").style(self.bold), value);
         }
         eprintln!("--------");
@@ -416,6 +417,35 @@ impl EventProcessor for EventProcessorWithHumanOutput {
     }
 }
 
+fn sanitize_config_summary_value(value: &str) -> String {
+    value
+        .chars()
+        .map(|ch| {
+            if ch.is_control() // C0/C1 controls, including newlines and escape.
+                || matches!(
+                    ch,
+                    '\u{061C}' // Arabic letter mark.
+                        | '\u{200E}' // Left-to-right mark.
+                        | '\u{200F}' // Right-to-left mark.
+                        | '\u{202A}' // Left-to-right embedding.
+                        | '\u{202B}' // Right-to-left embedding.
+                        | '\u{202C}' // Pop directional formatting.
+                        | '\u{202D}' // Left-to-right override.
+                        | '\u{202E}' // Right-to-left override.
+                        | '\u{2066}' // Left-to-right isolate.
+                        | '\u{2067}' // Right-to-left isolate.
+                        | '\u{2068}' // First strong isolate.
+                        | '\u{2069}' // Pop directional isolate.
+                )
+            {
+                '�'
+            } else {
+                ch
+            }
+        })
+        .collect()
+}
+
 fn config_summary_entries(
     config: &Config,
     session_configured_event: &SessionConfiguredEvent,
diff --git a/codex-rs/exec/src/event_processor_with_human_output_tests.rs b/codex-rs/exec/src/event_processor_with_human_output_tests.rs
index 5e89d48c7f93..95df404ab36a 100644
--- a/codex-rs/exec/src/event_processor_with_human_output_tests.rs
+++ b/codex-rs/exec/src/event_processor_with_human_output_tests.rs
@@ -23,6 +23,7 @@ use super::EventProcessorWithHumanOutput;
 use super::config_summary_entries;
 use super::final_message_from_turn_items;
 use super::reasoning_text;
+use super::sanitize_config_summary_value;
 use super::should_print_final_message_to_stdout;
 use super::should_print_final_message_to_tty;
 use crate::event_processor::EventProcessor;
@@ -174,6 +175,14 @@ fn summarizes_managed_read_only_permission_profile() {
     );
 }
 
+#[test]
+fn config_summary_values_are_single_line_terminal_text() {
+    assert_eq!(
+        sanitize_config_summary_value("repo\nmodel: other\r\x1b[2J\u{0007}\u{202E}rtl\u{2066}"),
+        "repo�model: other��[2J��rtl�"
+    );
+}
+
 #[tokio::test]
 async fn config_summary_entries_include_runtime_workspace_roots() {
     let codex_home = tempfile::tempdir().expect("create codex home");