diff --git a/termwiz/src/escape/osc.rs b/termwiz/src/escape/osc.rs
index 736269af5..9cac57e5e 100644
--- a/termwiz/src/escape/osc.rs
+++ b/termwiz/src/escape/osc.rs
@@ -881,8 +881,12 @@ impl ITermFileData {
         let last = osc.len() - 1;
         for (idx, s) in osc.iter().enumerate().skip(1) {
             let param = if idx == 1 {
-                // skip over File=
-                &s[5..]
+                if s.len() >= 5 {
+                    // skip over File=
+                    &s[5..]
+                } else {
+                    bail!("failed to parse file data; File= not found");
+                }
             } else {
                 s
             };
diff --git a/termwiz/src/escape/parser/mod.rs b/termwiz/src/escape/parser/mod.rs
index 54139fe9d..69e6a0c28 100644
--- a/termwiz/src/escape/parser/mod.rs
+++ b/termwiz/src/escape/parser/mod.rs
@@ -839,4 +839,10 @@ mod test {
             actions
         );
     }
+
+    #[test]
+    fn itermfiledata_oob() {
+        let mut p = Parser::new();
+        p.parse_as_vec(b"\x9d1337\xff;File\x1b");
+    }
 }