diff --git a/components/brave_shields/adblock/rs/Cargo.toml b/components/brave_shields/adblock/rs/Cargo.toml
index b7a43ece53bb..9cd6791233ec 100644
--- a/components/brave_shields/adblock/rs/Cargo.toml
+++ b/components/brave_shields/adblock/rs/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-adblock = { version = "0.8.0", default-features = false, features = ["full-regex-handling", "regex-debug-info", "css-validation"] }
+adblock = { version = "0.8.1", default-features = false, features = ["full-regex-handling", "regex-debug-info", "css-validation"] }
 cxx = "1.0"
 serde_json = "1.0"
 thiserror = "1.0"
diff --git a/third_party/rust/Cargo.lock b/third_party/rust/Cargo.lock
index 10f1a864bb3f..8fe756318048 100644
--- a/third_party/rust/Cargo.lock
+++ b/third_party/rust/Cargo.lock
@@ -4,7 +4,7 @@ version = 3
 
 [[package]]
 name = "adblock"
-version = "0.8.0"
+version = "0.8.1"
 dependencies = [
  "base64",
  "bitflags",
diff --git a/third_party/rust/adblock/v0_8/README.chromium b/third_party/rust/adblock/v0_8/README.chromium
index 73e30e2160aa..0eca9fb5306d 100644
--- a/third_party/rust/adblock/v0_8/README.chromium
+++ b/third_party/rust/adblock/v0_8/README.chromium
@@ -1,7 +1,7 @@
 Name: adblock
 URL: https://crates.io/crates/adblock
 Description: Native Rust module for Adblock Plus syntax (e.g. EasyList, EasyPrivacy) filter parsing and matching.
-Version: 0.8.0
+Version: 0.8.1
 Security Critical: no
 License: Mozilla Public License 2.0
-Revision: cb0dd04c193cf301403d7596bee326f4a0a1658b
+Revision: bc39fa8a52bc96db18e8c14de73ed63d883a7b09
diff --git a/third_party/rust/adblock/v0_8/crate/.cargo_vcs_info.json b/third_party/rust/adblock/v0_8/crate/.cargo_vcs_info.json
index caa9f4aa8557..021833609e52 100644
--- a/third_party/rust/adblock/v0_8/crate/.cargo_vcs_info.json
+++ b/third_party/rust/adblock/v0_8/crate/.cargo_vcs_info.json
@@ -1,6 +1,6 @@
 {
   "git": {
-    "sha1": "cb0dd04c193cf301403d7596bee326f4a0a1658b"
+    "sha1": "bc39fa8a52bc96db18e8c14de73ed63d883a7b09"
   },
   "path_in_vcs": ""
 }
\ No newline at end of file
diff --git a/third_party/rust/adblock/v0_8/crate/Cargo.lock b/third_party/rust/adblock/v0_8/crate/Cargo.lock
index 67000c8cb25f..ae63b8c94c87 100644
--- a/third_party/rust/adblock/v0_8/crate/Cargo.lock
+++ b/third_party/rust/adblock/v0_8/crate/Cargo.lock
@@ -4,7 +4,7 @@ version = 3
 
 [[package]]
 name = "adblock"
-version = "0.8.0"
+version = "0.8.1"
 dependencies = [
  "addr",
  "base64",
diff --git a/third_party/rust/adblock/v0_8/crate/Cargo.toml b/third_party/rust/adblock/v0_8/crate/Cargo.toml
index 8a94a144446a..b51e864eeed3 100644
--- a/third_party/rust/adblock/v0_8/crate/Cargo.toml
+++ b/third_party/rust/adblock/v0_8/crate/Cargo.toml
@@ -12,7 +12,7 @@
 [package]
 edition = "2021"
 name = "adblock"
-version = "0.8.0"
+version = "0.8.1"
 authors = [
     "Andrius Aucinas <aaucinas@brave.com>",
     "Anton Lazarev <alazarev@brave.com>",
diff --git a/third_party/rust/adblock/v0_8/crate/Cargo.toml.orig b/third_party/rust/adblock/v0_8/crate/Cargo.toml.orig
index d2edd45e4307..f2432f9892c3 100644
--- a/third_party/rust/adblock/v0_8/crate/Cargo.toml.orig
+++ b/third_party/rust/adblock/v0_8/crate/Cargo.toml.orig
@@ -1,6 +1,6 @@
 [package]
 name = "adblock"
-version = "0.8.0"
+version = "0.8.1"
 authors = ["Andrius Aucinas <aaucinas@brave.com>", "Anton Lazarev <alazarev@brave.com>"]
 edition = "2021"
 
diff --git a/third_party/rust/adblock/v0_8/crate/src/blocker.rs b/third_party/rust/adblock/v0_8/crate/src/blocker.rs
index 338eeacb2235..e69c058310dd 100644
--- a/third_party/rust/adblock/v0_8/crate/src/blocker.rs
+++ b/third_party/rust/adblock/v0_8/crate/src/blocker.rs
@@ -51,15 +51,18 @@ pub struct BlockerResult {
     /// modified at all, the new version will be here. This should be used
     /// as long as the request is not blocked.
     pub rewritten_url: Option<String>,
-    /// Exception is `Some` when the blocker matched on an exception rule.
+    /// Contains a string representation of any matched exception rule.
     /// Effectively this means that there was a match, but the request should
-    /// not be blocked. It is a non-empty string if the blocker was initialized
-    /// from a list of rules with debugging enabled, otherwise the original
-    /// string representation is discarded to reduce memory use.
+    /// not be blocked.
+    ///
+    /// If debugging was _not_ enabled (see [`crate::FilterSet::new`]), this
+    /// will only contain a constant `"NetworkFilter"` placeholder string.
     pub exception: Option<String>,
-    /// Filter--similarly to exception--includes the string representation of
-    /// the rule when there is a match and debugging is enabled. Otherwise, on
-    /// a match, it is `Some`.
+    /// When `matched` is true, this contains a string representation of the
+    /// matched blocking rule.
+    ///
+    /// If debugging was _not_ enabled (see [`crate::FilterSet::new`]), this
+    /// will only contain a constant `"NetworkFilter"` placeholder string.
     pub filter: Option<String>,
 }
 
@@ -2119,6 +2122,19 @@ fn test_removeparam_same_tokens() {
     }
 }
 
+#[cfg(test)]
+mod placeholder_string_tests {
+    /// If this changes, be sure to update the documentation for [`BlockerResult`] as well.
+    #[test]
+    fn test_constant_placeholder_string() {
+        let mut filter_set = crate::lists::FilterSet::new(false);
+        filter_set.add_filter("||example.com^", Default::default()).unwrap();
+        let engine = crate::Engine::from_filter_set(filter_set, true);
+        let block = engine.check_network_request(&crate::request::Request::new("https://example.com", "https://example.com", "document").unwrap());
+        assert_eq!(block.filter, Some("NetworkFilter".to_string()));
+    }
+}
+
 #[cfg(test)]
 mod legacy_rule_parsing_tests {
     use crate::test_utils::rules_from_lists;
diff --git a/third_party/rust/adblock/v0_8/crate/src/resources/resource_storage.rs b/third_party/rust/adblock/v0_8/crate/src/resources/resource_storage.rs
index 128a13e14a11..4d2f9f515b18 100644
--- a/third_party/rust/adblock/v0_8/crate/src/resources/resource_storage.rs
+++ b/third_party/rust/adblock/v0_8/crate/src/resources/resource_storage.rs
@@ -215,7 +215,7 @@ fn template_argument_regex(i: usize) -> Regex {
 fn patch_template_scriptlet(mut template: String, args: &[impl AsRef<str>]) -> String {
     // `regex` treats `$` as a special character. Instead, `$$` is interpreted as a literal `$`
     // character.
-    args.iter().enumerate().for_each(|(i, arg)| {
+    args.iter().take(TEMPLATE_ARGUMENT_RE.len()).enumerate().for_each(|(i, arg)| {
         template = TEMPLATE_ARGUMENT_RE[i]
             .replace(&template, arg.as_ref().replace('$', "$$"))
             .to_string();
@@ -559,6 +559,30 @@ mod scriptlet_storage_tests {
         );
     }
 
+    /// Currently, only 9 template arguments are supported - but reaching that limit should not
+    /// cause a panic.
+    #[test]
+    fn patch_argslist_many_args() {
+        let resources = ResourceStorage::from_resources([
+            Resource {
+                name: "abort-current-script.js".into(),
+                aliases: vec!["acs.js".into()],
+                kind: ResourceType::Mime(MimeType::ApplicationJavascript),
+                content: base64::encode("{{1}} {{2}} {{3}} {{4}} {{5}} {{6}} {{7}} {{8}} {{9}} {{10}} {{11}} {{12}}"),
+                dependencies: vec![],
+                permission: Default::default(),
+            },
+        ]);
+
+        let args = parse_scriptlet_args("acs, this, probably, is, going, to, break, brave, and, crash, it, instead, of, ignoring, it");
+        assert_eq!(args, vec!["acs", "this", "probably", "is", "going", "to", "break", "brave", "and", "crash", "it", "instead", "of", "ignoring", "it"]);
+
+        assert_eq!(
+            resources.get_scriptlet_resource("acs, this, probably, is, going, to, break, brave, and, crash, it, instead, of, ignoring, it", Default::default()),
+            Ok("this probably is going to break brave and crash {{10}} {{11}} {{12}}".to_string()),
+        );
+    }
+
     #[test]
     fn permissions() {
         const PERM0: PermissionMask = PermissionMask::from_bits(0b00000001);
diff --git a/third_party/rust/third_party.toml b/third_party/rust/third_party.toml
index 08a1802603ff..0d698c7beee0 100644
--- a/third_party/rust/third_party.toml
+++ b/third_party/rust/third_party.toml
@@ -228,7 +228,7 @@ if (is_mac) {
 '''
 
 [dependencies.adblock]
-version = "0.8.0"
+version = "0.8.1"
 default-features = false
 features = ["full-regex-handling", "regex-debug-info", "css-validation"]
 gn-variables-lib = '''