diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4861e724..397ca115 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,6 +29,19 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
+  dependency-advisories:
+    name: Dependency advisories
+    if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Install advisory scanner
+        run: cargo install cargo-deny --version 0.20.2 --locked
+      - name: Check locked dependencies
+        run: cargo deny --locked check --warn unmaintained advisories bans sources
+
   changes:
     name: Select checks
     runs-on: ubuntu-24.04
@@ -343,4 +356,4 @@ jobs:
         run: |
           . "$HOME/.cargo/env"
           export CRAFT_FONTS_DIR="$PWD/craft-fonts"
-          cargo check --all-targets --locked --target riscv64gc-unknown-linux-gnu
\ No newline at end of file
+          cargo check --all-targets --locked --target riscv64gc-unknown-linux-gnu
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 26652e44..6270c57c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -100,6 +100,8 @@ The [README](README.md#architecture) has the layer table. The short version:
    not.) Permissive
    dependencies are fine. Note which one you're adding and why in the PR, and run
    `cargo xtask licences` so THIRD-PARTY-LICENSES.txt lists it (CI checks that it is current).
+   Nightly/manual CI also scans advisories, bans and sources with cargo-deny; see
+   [the local command and coverage limits](docs/book/src/dev/testing.md#dependency-advisories).
 3. **Every asset is original or openly licensed and has a row in
    [ATTRIBUTION.md](ATTRIBUTION.md).** Icons are drawn in code (`crates/ui-egui/src/icons.rs`).
    `cargo xtask assets` enforces this.
diff --git a/Cargo.lock b/Cargo.lock
index a20cfac7..19820eed 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2765,15 +2765,6 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
 
-[[package]]
-name = "quick-xml"
-version = "0.38.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b66c2058c55a409d601666cffe35f04333cf1013010882cec174a7467cd4e21c"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "quick-xml"
 version = "0.41.0"
@@ -3297,7 +3288,7 @@ dependencies = [
  "embed-resource",
  "hidapi",
  "log",
- "quick-xml 0.38.4",
+ "quick-xml",
  "rfd",
  "serde_json",
  "solidcraft-engine",
@@ -3358,7 +3349,7 @@ dependencies = [
 name = "solidcraft-io"
 version = "0.7.0"
 dependencies = [
- "quick-xml 0.38.4",
+ "quick-xml",
  "serde",
  "serde_json",
  "sha2",
@@ -4182,7 +4173,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "338e30461b3a2b67d70eb30a6d89f8e0c93a833e07d2ae89085cd070c4a00ac0"
 dependencies = [
  "proc-macro2",
- "quick-xml 0.41.0",
+ "quick-xml",
  "quote",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 41f7c72d..b13211dd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@ truck-topology = "0.6"
 
 # packages (3MF)
 zip = { version = "3", default-features = false, features = ["deflate"] }
-quick-xml = "0.38"
+quick-xml = "0.41"
 
 # fonts (sketch text outlines; MIT OR Apache-2.0, pure Rust)
 ttf-parser = { version = "0.25", default-features = false, features = ["std"] }
diff --git a/ROADMAP.md b/ROADMAP.md
index bf81afb0..709880c2 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -164,6 +164,11 @@ PCB / Package, Render, Animation, Simulation, Manufacture/CAM, Drawings.
 
 ## Known limitations
 
+- Scheduled and manual CI scan locked dependency advisories, bans and sources with
+  cargo-deny. Vulnerabilities fail the scan; unmaintained crates warn. Local vendored
+  patches require separate upstream review because advisory databases cannot version-match
+  their path dependencies. Pull requests retain the existing licence checks.
+
 - Associative shell-face sketches require a unique certified planar source. Nested shell
   attachments and ambiguous coincident sources remain unsupported.
 - Fillets and chamfers: constant, variable-radius and chord-length fillets; a radius per edge,
diff --git a/THIRD-PARTY-LICENSES.txt b/THIRD-PARTY-LICENSES.txt
index b6a2e4c5..263dd52c 100644
--- a/THIRD-PARTY-LICENSES.txt
+++ b/THIRD-PARTY-LICENSES.txt
@@ -1,6 +1,6 @@
 Third-party software in SolidCraft
 
-SolidCraft (the desktop app, solidcraft-cli and the web app) is built from the 454 crates below.
+SolidCraft (the desktop app, solidcraft-cli and the web app) is built from the 453 crates below.
 Generated by `cargo xtask licences` from Cargo.lock and the crates' own licence files.
 SolidCraft's own licence is in LICENSE-MIT and LICENSE-APACHE, and NOTICE.
 
@@ -262,7 +262,6 @@ proc-macro2 1.0.107  (MIT OR Apache-2.0)
 profiling 1.0.18  (MIT OR Apache-2.0)
 pxfm 0.1.30  (BSD-3-Clause OR Apache-2.0)
 quick-error 2.0.1  (MIT/Apache-2.0)
-quick-xml 0.38.4  (MIT)
 quick-xml 0.41.0  (MIT)
 quote 1.0.47  (MIT OR Apache-2.0)
 r-efi 5.3.0  (MIT OR Apache-2.0 OR LGPL-2.1-or-later)
@@ -8709,7 +8708,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 
 ================================================================================
-quick-xml 0.38.4, quick-xml 0.41.0
+quick-xml 0.41.0
 ================================================================================
 
 The MIT License (MIT)
diff --git a/crates/io/src/svg.rs b/crates/io/src/svg.rs
index 052935f0..e00d0574 100644
--- a/crates/io/src/svg.rs
+++ b/crates/io/src/svg.rs
@@ -114,7 +114,10 @@ fn attrs(e: &BytesStart) -> Vec<(String, String)> {
         .flatten()
         .map(|a| {
             let k = String::from_utf8_lossy(a.key.local_name().as_ref()).to_string();
-            let v = a.unescape_value().map(|v| v.to_string()).unwrap_or_else(|_| String::from_utf8_lossy(&a.value).to_string());
+            let v = a
+                .normalized_value(quick_xml::XmlVersion::Implicit1_0)
+                .map(|v| v.to_string())
+                .unwrap_or_else(|_| String::from_utf8_lossy(&a.value).to_string());
             (k, v)
         })
         .collect()
diff --git a/crates/io/src/threemf.rs b/crates/io/src/threemf.rs
index 4a513a3d..fbb58922 100644
--- a/crates/io/src/threemf.rs
+++ b/crates/io/src/threemf.rs
@@ -319,7 +319,10 @@ fn attrs(e: &BytesStart) -> HashMap<String, String> {
     let mut m = HashMap::new();
     for a in e.attributes().flatten() {
         let k = String::from_utf8_lossy(a.key.local_name().as_ref()).to_string();
-        let v = a.unescape_value().map(|v| v.to_string()).unwrap_or_else(|_| String::from_utf8_lossy(&a.value).to_string());
+        let v = a
+            .normalized_value(quick_xml::XmlVersion::Implicit1_0)
+            .map(|v| v.to_string())
+            .unwrap_or_else(|_| String::from_utf8_lossy(&a.value).to_string());
         m.insert(k, v);
     }
     m
diff --git a/deny.toml b/deny.toml
new file mode 100644
index 00000000..c24dbb4c
--- /dev/null
+++ b/deny.toml
@@ -0,0 +1,15 @@
+# Licences remain covered by `cargo xtask licences --check`.
+[advisories]
+# The nightly command downgrades only this diagnostic with --warn unmaintained.
+unmaintained = "all"
+yanked = "warn"
+
+[bans]
+multiple-versions = "warn"
+wildcards = "warn"
+allow-wildcard-paths = true
+
+[sources]
+unknown-registry = "deny"
+unknown-git = "deny"
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
diff --git a/docs/book/src/dev/testing.md b/docs/book/src/dev/testing.md
index 8df5ea16..bf4b0055 100644
--- a/docs/book/src/dev/testing.md
+++ b/docs/book/src/dev/testing.md
@@ -15,6 +15,28 @@ profile and the wasm build check.
 | Kill mid-save | `apps/solidcraft-cli/tests/kill_mid_save.rs` | a save killed at any moment leaves a readable file |
 | Reference tests | `cargo xtask oracle` → [docs/oracle.md](oracle.md) | parts rebuilt from `tests/oracle/*/recipe.json`, compared with analytic or FreeCAD expected values |
 
+## Dependency advisories
+
+Scheduled and manually dispatched CI runs have a separate **Dependency advisories** job;
+new advisories do not fail unrelated pull requests. To run the same scan locally:
+
+```sh
+cargo install cargo-deny --version 0.20.2 --locked
+cargo deny --locked check --warn unmaintained advisories bans sources
+```
+
+The checked-in `deny.toml` rejects vulnerabilities and unknown registries/git sources.
+Unmaintained crates, yanked versions and duplicate versions warn; licences remain covered
+by `cargo xtask licences --check`. Review advisory failures and update dependencies rather
+than adding broad ignores. The first scan prompted an update to quick-xml 0.41.0 for
+[RUSTSEC-2026-0194](https://rustsec.org/advisories/RUSTSEC-2026-0194) and
+[RUSTSEC-2026-0195](https://rustsec.org/advisories/RUSTSEC-2026-0195).
+
+Coverage excludes the version matching of local path patches: `truck-shapeops`,
+`truck-stepio`, `truck-meshalgo`, `matext4cgmath` and `egui-wgpu` in `vendor/`. Their checked-in
+code and patches still need comparison with their permissively licensed upstreams; a green
+scan does not establish their security or incorporate an upstream fix automatically.
+
 ## UI scenarios
 
 A scenario is a JSON list of steps run against the real app with a headless egui context: