diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8916384..b797efc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,7 +13,12 @@ correspond to git tags (`vX.Y.Z`) and `nodejs/package.json`'s `version`.
 - Genericized committed defaults in `conf/base.js` and `conf/development.js`: LDAP now defaults to `ldap://localhost` with `dc=example,dc=com`, and OIDC endpoints default to `https://sso.example.com` instead of internal theta42 infrastructure.
 - The bootstrap `proxyadmin2` account now gets a random, one-time password when `auth.localAdminPass` is unset, instead of the well-known default `proxyadmin2`. The password is printed to the log on first creation and can be made deterministic by setting `auth.localAdminPass` in the secrets file.
 
+### Security
+- Sanitized rendered docs HTML via `xss` in `routes/docs.js` so malicious markdown cannot inject scripts or other dangerous markup into the in-app docs viewer.
+- The Unix socket JSON-RPC socket is now created with mode `660` instead of world-writable `777`.
+
 ### Fixed
+- An existing single-label subdomain host (e.g. `sso.nl.wgnode.com`) could not be attached to a wildcard cert added later (e.g. `*.nl.wgnode.com`): `Host.lookUpWildcardParent()` only checked the wildcard-as-child position (the wildcard's own base domain) and missed the far more common wildcard-as-sibling case, so the edit form's "Parent Wildcard" option stayed permanently greyed out. It now checks both positions.
 - The global error handler no longer leaks `err.keys`, stack traces, or other internal details in JSON responses; only `name` and `message` are returned to clients.
 - `DEPLOYMENT.md` and `docs/docker.md` now correctly describe the `CONF_SECRETS` env-var mechanism instead of the old symlink behavior.
 
@@ -123,7 +128,7 @@ First tagged release. Establishes the `vX.Y.Z` tag convention that the in-app up
 - Standalone backup script (`ops/backup.sh`) for deployments not using theta-env's orchestrator — snapshots Redis and `./config`, with retention.
 - Admin-only in-app banner that checks GitHub releases every 24h and surfaces available updates.
 
-[Unreleased]: https://github.com/theta42/proxy/compare/v1.1.15...HEAD
+[Unreleased]: https://github.com/theta42/proxy/compare/v1.1.16...HEAD
 [1.1.15]: https://github.com/theta42/proxy/compare/v1.1.14...v1.1.15
 [1.1.14]: https://github.com/theta42/proxy/compare/v1.1.13...v1.1.14
 [1.1.13]: https://github.com/theta42/proxy/compare/v1.1.12...v1.1.13
diff --git a/nodejs/models/host.js b/nodejs/models/host.js
index 12c52fb..5abc762 100755
--- a/nodejs/models/host.js
+++ b/nodejs/models/host.js
@@ -518,24 +518,38 @@ class Host extends Table{
 		if(parent && parent['*'] && parent['*']['#record']) return parent['*']['#record'];
 	}
 
-	// Find the wildcard covering @host as its own base domain (e.g.
-	// "*.cool.mysite.com" for host="cool.mysite.com"), regardless of whether
-	// @host is already registered as its own host. Unlike lookUp(), which
-	// walks to and returns @host's own exact-match leaf when one exists, this
-	// walks to that exact position and looks one level deeper at its "*"
-	// child -- the sibling wildcard slot -- so it still finds the parent
-	// wildcard even when @host already has its own (non-wildcard) record.
-	// Used when attaching an already-created host to a wildcard after the
-	// fact (see update() below); Host.create()'s own wildcardChild handling
-	// can keep using plain lookUp() since a host being newly created hasn't
-	// claimed its own leaf yet.
+	// Find the wildcard that could cover @host, regardless of whether @host is
+	// already registered as its own host. Unlike lookUp(), which walks to and
+	// returns @host's own exact-match leaf when one exists, this keeps looking
+	// for a sibling/child "*" slot, so it still finds the parent wildcard even
+	// when @host already has its own (non-wildcard) record. Used when attaching
+	// an already-created host to a wildcard after the fact (see update() below);
+	// Host.create()'s own wildcardChild handling can keep using plain lookUp()
+	// since a host being newly created hasn't claimed its own leaf yet.
+	//
+	// Two tree positions qualify, and we must check BOTH:
+	//   1. Child "*" of @host's own node -- @host is the wildcard's base domain
+	//      (e.g. "*.cool.mysite.com" covers host="cool.mysite.com").
+	//   2. Sibling "*" one level up -- @host is a single-label subdomain of the
+	//      wildcard (e.g. "*.nl.wgnode.com" covers host="sso.nl.wgnode.com").
+	// Case 2 is the common one and was previously missed: the walk consumed the
+	// leftmost label ("sso") and only inspected that leaf's "*" child, so an
+	// already-existing sibling subdomain could never be attached to its wildcard.
 	static lookUpWildcardParent(host){
 		let place = this.lookUpObj;
+		let parent = undefined;
 		for(let fragment of host.split('.').reverse()){
-			if(!place[fragment]) return undefined;
+			// @host may have no leaf of its own (brand-new subdomain); that case
+			// is already handled by plain lookUp()'s wildcard fallback in the
+			// caller, so just stop -- we've still tracked `parent` for case 2.
+			if(!place[fragment]){ place = undefined; break; }
+			parent = place;
 			place = place[fragment];
 		}
-		if(place['*'] && place['*']['#record']) return place['*']['#record'];
+		// Case 1: wildcard is a child of @host's own node.
+		if(place && place['*'] && place['*']['#record']) return place['*']['#record'];
+		// Case 2: wildcard is a sibling of @host's leftmost label.
+		if(parent && parent['*'] && parent['*']['#record']) return parent['*']['#record'];
 	}
 
 	static async lookUpReady(){
diff --git a/nodejs/test/unit/host_lookup.test.js b/nodejs/test/unit/host_lookup.test.js
index 71f85f2..58a461c 100644
--- a/nodejs/test/unit/host_lookup.test.js
+++ b/nodejs/test/unit/host_lookup.test.js
@@ -185,6 +185,35 @@ describe('Host wildcard base-domain lookup', () => {
 		await populateTree(Host, ['*.cool.mysite.com']);
 		assert.strictEqual(Host.lookUpWildcardParent('other.example.com'), undefined);
 	});
+
+	// Regression: the common case -- an already-existing single-label subdomain
+	// (its own auto-SSL/HTTP-01 host) sitting beside a wildcard, e.g.
+	// sso.nl.wgnode.com under *.nl.wgnode.com. The wildcard is a SIBLING of the
+	// subdomain's leftmost label, not a child of its node, so the old walk (which
+	// consumed "sso" and only checked that leaf's "*" child) never found it and
+	// the edit form's "Parent Wildcard" option stayed permanently greyed out.
+	test('lookUpWildcardParent finds a sibling wildcard for an existing single-label subdomain', async () => {
+		await populateTree(Host, ['sso.nl.wgnode.com', '*.nl.wgnode.com']);
+		const result = Host.lookUpWildcardParent('sso.nl.wgnode.com');
+		assert.ok(result, 'Should find the sibling wildcard');
+		assert.strictEqual(result.host, '*.nl.wgnode.com');
+	});
+
+	// A subdomain with no leaf of its own (never created) is deliberately NOT
+	// this method's job -- the walk stops before reaching the sibling "*" slot.
+	// The route resolves that case via plain lookUp()'s wildcard fallback first
+	// (covered in the route-fallback describe block below).
+	test('lookUpWildcardParent returns undefined for a subdomain with no leaf of its own', async () => {
+		await populateTree(Host, ['*.nl.wgnode.com']);
+		assert.strictEqual(Host.lookUpWildcardParent('api.nl.wgnode.com'), undefined);
+	});
+
+	test('lookUpWildcardParent does not treat a deeper wildcard as covering a shallower host', async () => {
+		// *.deep.nl.wgnode.com must NOT be offered as a parent for sso.nl.wgnode.com
+		// (a single-level wildcard covers only its own direct children).
+		await populateTree(Host, ['sso.nl.wgnode.com', '*.deep.nl.wgnode.com']);
+		assert.strictEqual(Host.lookUpWildcardParent('sso.nl.wgnode.com'), undefined);
+	});
 });
 
 /**
@@ -231,6 +260,24 @@ describe('Host wildcard-parent route fallback (lookUp then lookUpWildcardParent)
 		await populateTree(Host, ['cool.mysite.com']);
 		assert.strictEqual(findWildcardParent('cool.mysite.com'), null);
 	});
+
+	// The user's scenario: sso.nl.wgnode.com already exists as its own host, and
+	// a *.nl.wgnode.com wildcard is added afterward. lookUp() resolves to sso's
+	// own (non-wildcard) leaf, so the fallback to lookUpWildcardParent() is what
+	// surfaces the sibling wildcard and lets the edit form offer conversion.
+	test('finds the sibling wildcard for an already-existing single-label subdomain', async () => {
+		await populateTree(Host, ['sso.nl.wgnode.com', '*.nl.wgnode.com']);
+		const result = findWildcardParent('sso.nl.wgnode.com');
+		assert.ok(result);
+		assert.strictEqual(result.host, '*.nl.wgnode.com');
+	});
+
+	test('finds the sibling wildcard for a never-created single-label subdomain', async () => {
+		await populateTree(Host, ['*.nl.wgnode.com']);
+		const result = findWildcardParent('api.nl.wgnode.com');
+		assert.ok(result);
+		assert.strictEqual(result.host, '*.nl.wgnode.com');
+	});
 });
 
 /**
@@ -265,11 +312,17 @@ function createMockHostClassWithWildcardParentFix() {
 
 		static lookUpWildcardParent(host) {
 			let place = this.lookUpObj;
+			let parent = undefined;
 			for(let fragment of host.split('.').reverse()){
-				if(!place[fragment]) return undefined;
+				if(!place[fragment]){ place = undefined; break; }
+				parent = place;
 				place = place[fragment];
 			}
-			if(place['*'] && place['*']['#record']) return place['*']['#record'];
+			// Case 1: wildcard is a child of host's own node (base domain).
+			if(place && place['*'] && place['*']['#record']) return place['*']['#record'];
+			// Case 2: wildcard is a sibling of host's leftmost label
+			// (single-label subdomain, e.g. sso.nl.wgnode.com -> *.nl.wgnode.com).
+			if(parent && parent['*'] && parent['*']['#record']) return parent['*']['#record'];
 		}
 	};
 }