diff --git a/src/plugins/http/csrf.rs b/src/plugins/http/csrf.rs
index f487971..2d680ac 100644
--- a/src/plugins/http/csrf.rs
+++ b/src/plugins/http/csrf.rs
@@ -64,7 +64,9 @@ pub(crate) async fn handle(
             if res.status().is_success() {
                 // get cookie from header
                 if let Some(cookie) = res.headers().get("set-cookie") {
-                    token.cookie = cookie.to_str().unwrap().to_owned();
+                    // decode lossily: a malicious server can send non-ASCII header bytes that
+                    // HeaderValue::to_str would reject, panicking (abort) the process.
+                    token.cookie = String::from_utf8_lossy(cookie.as_bytes()).into_owned();
                 } else {
                     log::warn!("csrf page unexpectetly did not return any cookie");
                 }
diff --git a/src/plugins/http/mod.rs b/src/plugins/http/mod.rs
index 8a850ae..0199101 100644
--- a/src/plugins/http/mod.rs
+++ b/src/plugins/http/mod.rs
@@ -278,13 +278,18 @@ impl HTTP {
                 continue;
             }
 
+            // header values may contain non-ASCII (obs-text, 0x80..=0xFF) bytes, which
+            // HeaderValue::to_str rejects; decode them lossily instead of unwrapping so a
+            // malicious or misbehaving server cannot abort the process (panic = "abort").
+            let header_value = String::from_utf8_lossy(value.as_bytes());
+
             if header_var_name == "content_type" {
                 content_type_set = true;
-                content_type = value.to_str().unwrap().to_owned();
+                content_type = header_value.to_string();
             }
 
             context
-                .set_value(header_var_name, Value::from(value.to_str().unwrap()))
+                .set_value(header_var_name, Value::from(header_value.as_ref()))
                 .map_err(|e| e.to_string())?;
         }
 
@@ -575,7 +580,8 @@ impl HTTP {
                 if status.is_redirection()
                     && let Some(relocation) = relocation
                 {
-                    let mut relocation = relocation.to_str().unwrap().to_owned();
+                    let mut relocation =
+                        String::from_utf8_lossy(relocation.as_bytes()).into_owned();
                     // redirect to a page
                     if relocation.starts_with("/") || relocation.contains(&creds.target) {
                         return Ok(());
@@ -717,7 +723,7 @@ impl HTTP {
             Err(e) => Err(fmt_request_error(e)),
             Ok(res) => {
                 let cookie = if let Some(cookie) = res.headers().get(COOKIE) {
-                    cookie.to_str().unwrap().to_owned()
+                    String::from_utf8_lossy(cookie.as_bytes()).into_owned()
                 } else {
                     "".to_owned()
                 };
diff --git a/src/plugins/port_scanner/grabbers/http.rs b/src/plugins/port_scanner/grabbers/http.rs
index 118bbd7..5f7902d 100644
--- a/src/plugins/port_scanner/grabbers/http.rs
+++ b/src/plugins/port_scanner/grabbers/http.rs
@@ -64,7 +64,10 @@ pub(crate) async fn parse_http_response(
     // collect headers
     for (name, value) in response.headers() {
         let name = name.to_string();
-        let mut value = value.to_str().unwrap();
+        // decode lossily instead of unwrapping: a scanned host can return non-ASCII header
+        // bytes that HeaderValue::to_str rejects, which would panic (abort) the process.
+        let value = String::from_utf8_lossy(value.as_bytes());
+        let mut value = value.as_ref();
 
         if name == "content-type" {
             if value.contains(';') {
diff --git a/src/utils/target/multi.rs b/src/utils/target/multi.rs
index c27f031..8574509 100644
--- a/src/utils/target/multi.rs
+++ b/src/utils/target/multi.rs
@@ -25,11 +25,21 @@ fn parse_multiple_targets_atom(expression: &str) -> Result<Vec<String>, Error> {
             .collect())
     } else if let Some(caps) = IPV4_RANGE_PARSER.captures(expression) {
         // ipv4 range like 192.168.1.1-10 or 192.168.1.1-10:port
-        let a: u8 = caps.get(1).unwrap().as_str().parse().unwrap();
-        let b: u8 = caps.get(2).unwrap().as_str().parse().unwrap();
-        let c: u8 = caps.get(3).unwrap().as_str().parse().unwrap();
-        let start: u8 = caps.get(4).unwrap().as_str().parse().unwrap();
-        let stop: u8 = caps.get(5).unwrap().as_str().parse().unwrap();
+        //
+        // each octet is captured as `\d+`, which also matches out-of-range values such as
+        // "256.0.0.0-1"; parse fallibly so a bad octet becomes a returned error instead of a
+        // panic. Under the release profile's `panic = "abort"` such a panic aborts the whole
+        // process, and this parser is reachable from the unauthenticated REST/MCP API.
+        let octet = |m: regex::Match| -> Result<u8, Error> {
+            m.as_str().parse::<u8>().map_err(|_| {
+                format!("invalid IPv4 octet '{}' in target '{}'", m.as_str(), expression)
+            })
+        };
+        let a = octet(caps.get(1).unwrap())?;
+        let b = octet(caps.get(2).unwrap())?;
+        let c = octet(caps.get(3).unwrap())?;
+        let start = octet(caps.get(4).unwrap())?;
+        let stop = octet(caps.get(5).unwrap())?;
 
         if stop < start {
             return Err(format!(
@@ -142,6 +152,19 @@ mod tests {
         assert!(res.is_err());
     }
 
+    #[test]
+    fn ipv4_range_out_of_range_octet_errors_without_panic() {
+        // regression: octets are captured as `\d+`, so values > 255 must return an error
+        // rather than panic (which aborts under the release `panic = "abort"` profile).
+        for target in ["256.0.0.0-1", "1.2.3.4-999", "1.2.3.300-1", "999.0.0.0-0"] {
+            assert!(
+                parse_multiple_targets(target).is_err(),
+                "expected an error for out-of-range range target {:?}",
+                target
+            );
+        }
+    }
+
     #[test]
     fn can_parse_comma_separated() {
         let expected = Ok(vec![