diff --git a/rust/Cargo.lock.in b/rust/Cargo.lock.in
index 498aba94f973..698413e33f30 100644
--- a/rust/Cargo.lock.in
+++ b/rust/Cargo.lock.in
@@ -85,7 +85,7 @@ dependencies = [
  "nom",
  "num-traits 0.2.19",
  "rusticata-macros",
- "thiserror",
+ "thiserror 1.0.68",
  "time",
 ]
 
@@ -452,13 +452,13 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "ldap-parser"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "798f8bf8793bb624e6b840f1c73949949709f9301dc63ddb236e9230674575c9"
+checksum = "d9fde2bd93cf7db2fdba06379826baee0d5414ea093c8c1946701b5a6df046d3"
 dependencies = [
  "asn1-rs",
  "rusticata-macros",
- "thiserror",
+ "thiserror 2.0.10",
 ]
 
 [[package]]
@@ -778,7 +778,7 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ebace6889caf889b4d3f76becee12e90353f2b8c7d875534a71e5742f8f6f83"
 dependencies = [
- "thiserror",
+ "thiserror 1.0.68",
  "toml",
 ]
 
@@ -961,7 +961,7 @@ dependencies = [
  "asn1-rs",
  "nom",
  "rusticata-macros",
- "thiserror",
+ "thiserror 1.0.68",
 ]
 
 [[package]]
@@ -1121,7 +1121,16 @@ version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "02dd99dc800bbb97186339685293e1cc5d9df1f8fae2d0aecd9ff1c77efea892"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.68",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3ac7f54ca534db81081ef1c1e7f6ea8a3ef428d2fc069097c079443d24124d3"
+dependencies = [
+ "thiserror-impl 2.0.10",
 ]
 
 [[package]]
@@ -1135,6 +1144,17 @@ dependencies = [
  "syn 2.0.87",
 ]
 
+[[package]]
+name = "thiserror-impl"
+version = "2.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e9465d30713b56a37ede7185763c3492a91be2f5fa68d958c44e41ab9248beb"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.87",
+]
+
 [[package]]
 name = "time"
 version = "0.3.36"
@@ -1254,7 +1274,7 @@ dependencies = [
  "nom",
  "oid-registry",
  "rusticata-macros",
- "thiserror",
+ "thiserror 1.0.68",
  "time",
 ]
 
diff --git a/rust/Cargo.toml.in b/rust/Cargo.toml.in
index eaeacff8356e..8fad5fee77e3 100644
--- a/rust/Cargo.toml.in
+++ b/rust/Cargo.toml.in
@@ -62,7 +62,7 @@ lazy_static = "~1.4.0"
 base64 = "~0.22.1"
 bendy = { version = "~0.3.3", default-features = false }
 asn1-rs = { version = "~0.6.1" }
-ldap-parser = { version = "~0.4.0" }
+ldap-parser = { version = "~0.4.1" }
 hex = "~0.4.3"
 
 time = "~0.3.36"
diff --git a/rust/src/ldap/ldap.rs b/rust/src/ldap/ldap.rs
index 1d6032f091f0..44c4eeedc3aa 100644
--- a/rust/src/ldap/ldap.rs
+++ b/rust/src/ldap/ldap.rs
@@ -193,11 +193,7 @@ impl LdapState {
 
         if self.request_gap {
             match ldap_parse_msg(input) {
-                Ok((_, msg)) => {
-                    let ldap_msg = LdapMessage::from(msg);
-                    if ldap_msg.is_unknown() {
-                        return AppLayerResult::err();
-                    }
+                Ok((_, _msg)) => {
                     AppLayerResult::ok();
                 }
                 Err(_e) => {
@@ -264,11 +260,7 @@ impl LdapState {
 
         if self.response_gap {
             match ldap_parse_msg(input) {
-                Ok((_, msg)) => {
-                    let ldap_msg = LdapMessage::from(msg);
-                    if ldap_msg.is_unknown() {
-                        return AppLayerResult::err();
-                    }
+                Ok((_, _msg)) => {
                     AppLayerResult::ok();
                 }
                 Err(_e) => {
@@ -518,9 +510,6 @@ fn probe(input: &[u8], direction: Direction, rdir: *mut u8) -> AppProto {
     match ldap_parse_msg(input) {
         Ok((_, msg)) => {
             let ldap_msg = LdapMessage::from(msg);
-            if ldap_msg.is_unknown() {
-                return ALPROTO_FAILED;
-            }
             if direction == Direction::ToServer && !ldap_msg.is_request() {
                 unsafe {
                     *rdir = Direction::ToClient.into();
diff --git a/rust/src/ldap/types.rs b/rust/src/ldap/types.rs
index 901201b4a35e..575eb705966d 100644
--- a/rust/src/ldap/types.rs
+++ b/rust/src/ldap/types.rs
@@ -256,6 +256,11 @@ pub struct CompareRequest {
     pub ava: AttributeValueAssertion,
 }
 
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct AbandonRequest {
+    pub message_id: u32,
+}
+
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct ExtendedRequest {
     pub request_name: LdapOID,
@@ -297,7 +302,7 @@ pub enum ProtocolOp {
     ExtendedRequest(ExtendedRequest),
     ExtendedResponse(ExtendedResponse),
     IntermediateResponse(IntermediateResponse),
-    Unknown,
+    AbandonRequest(AbandonRequest),
 }
 
 impl Display for ProtocolOp {
@@ -320,10 +325,10 @@ impl Display for ProtocolOp {
             ProtocolOp::ModDnResponse(_) => write!(f, "mod_dn_response"),
             ProtocolOp::CompareRequest(_) => write!(f, "compare_request"),
             ProtocolOp::CompareResponse(_) => write!(f, "compare_response"),
+            ProtocolOp::AbandonRequest(_) => write!(f, "abandon_request"),
             ProtocolOp::ExtendedRequest(_) => write!(f, "extended_request"),
             ProtocolOp::ExtendedResponse(_) => write!(f, "extended_response"),
             ProtocolOp::IntermediateResponse(_) => write!(f, "intermediate_response"),
-            ProtocolOp::Unknown => write!(f, "unknown"),
         }
     }
 }
@@ -376,7 +381,7 @@ impl From<ldap_parser::ldap::LdapMessage<'_>> for LdapMessage {
             ldap_parser::ldap::ProtocolOp::IntermediateResponse(msg) => {
                 Self::from_intermediate_response(msg)
             }
-            ldap_parser::ldap::ProtocolOp::AbandonRequest(_) => ProtocolOp::Unknown,
+            ldap_parser::ldap::ProtocolOp::AbandonRequest(msg) => Self::from_abandon_request(msg),
         };
         let controls = ldap_msg.controls.map(|ctls| {
             ctls.iter()
@@ -397,13 +402,6 @@ impl From<ldap_parser::ldap::LdapMessage<'_>> for LdapMessage {
 }
 
 impl LdapMessage {
-    pub fn is_unknown(&self) -> bool {
-        match self.protocol_op {
-            ProtocolOp::Unknown => return true,
-            _ => return false,
-        }
-    }
-
     pub fn is_request(&self) -> bool {
         match self.protocol_op {
             ProtocolOp::BindRequest(_)
@@ -414,7 +412,7 @@ impl LdapMessage {
             | ProtocolOp::DelRequest(_)
             | ProtocolOp::ModDnRequest(_)
             | ProtocolOp::CompareRequest(_)
-            | ProtocolOp::Unknown // AbandonRequest
+            | ProtocolOp::AbandonRequest(_)
             | ProtocolOp::ExtendedRequest(_) => {
                 return true;
             }
@@ -589,6 +587,10 @@ impl LdapMessage {
         })
     }
 
+    fn from_abandon_request(msg: ldap_parser::ldap::MessageID) -> ProtocolOp {
+        ProtocolOp::AbandonRequest(AbandonRequest {message_id: msg.0})
+    }
+
     fn from_extended_request(msg: ldap_parser::ldap::ExtendedRequest) -> ProtocolOp {
         ProtocolOp::ExtendedRequest(ExtendedRequest {
             request_name: LdapOID(msg.request_name.0.to_string()),