diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8f11f7..35478a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,19 @@
 
 Notable changes to Mailpit will be documented in this file.
 
+## [v1.6.9]
+
+### API
+- Return blank 200 response for OPTIONS requests (CORS)
+
+### Bugfix
+- Correctly escape JS cid regex
+
+### Libs
+- Update node modules
+- Update Go modules
+
+
 ## [v1.6.8]
 
 ### Bugfix
diff --git a/go.mod b/go.mod
index 25876fd..4e0d03d 100644
--- a/go.mod
+++ b/go.mod
@@ -47,9 +47,9 @@ require (
 	golang.org/x/crypto v0.8.0 // indirect
 	golang.org/x/image v0.7.0 // indirect
 	golang.org/x/mod v0.10.0 // indirect
-	golang.org/x/net v0.9.0 // indirect
-	golang.org/x/sys v0.7.0 // indirect
-	golang.org/x/tools v0.8.0 // indirect
+	golang.org/x/net v0.10.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	golang.org/x/tools v0.9.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	lukechampine.com/uint128 v1.3.0 // indirect
 	modernc.org/cc/v3 v3.40.0 // indirect
diff --git a/go.sum b/go.sum
index ee8797a..ed1839b 100644
--- a/go.sum
+++ b/go.sum
@@ -145,12 +145,12 @@ golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
-golang.org/x/net v0.9.0 h1:aWJ/m6xSmxWBx+V0XRHTlrYrPG56jKsLdTFmsSsCzOM=
-golang.org/x/net v0.9.0/go.mod h1:d48xBJpPfHeWQsugry2m+kC02ZBRGRgulfHnEXEuWns=
+golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.2.0 h1:PUR+T4wwASmuSTYdKjYHI5TD22Wy5ogLU5qZCOLxBrI=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -159,8 +159,8 @@ golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
-golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
@@ -175,8 +175,8 @@ golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/tools v0.8.0 h1:vSDcovVPld282ceKgDimkRSC8kpaH1dgyc9UMzlt84Y=
-golang.org/x/tools v0.8.0/go.mod h1:JxBZ99ISMI5ViVkT1tr6tdNmXeTrcpVSD3vZ1RsRdN4=
+golang.org/x/tools v0.9.0 h1:CtBMYmb33qYal6XpayZzNXlyK/3FpZV8bDq4CZo57b8=
+golang.org/x/tools v0.9.0/go.mod h1:owI94Op576fPu3cIGQeHs3joujW/2Oc6MtlxbF5dfNc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -194,8 +194,6 @@ modernc.org/ccgo/v3 v3.16.13 h1:Mkgdzl46i5F/CNR/Kj80Ri59hC8TKAhZrYSaqvkwzUw=
 modernc.org/ccgo/v3 v3.16.13/go.mod h1:2Quk+5YgpImhPjv2Qsob1DnZ/4som1lJTodubIcoUkY=
 modernc.org/ccorpus v1.11.6 h1:J16RXiiqiCgua6+ZvQot4yUuUy8zxgqbqEEUuGPlISk=
 modernc.org/httpfs v1.0.6 h1:AAgIpFZRXuYnkjftxTAZwMIiwEqAfk8aVB2/oA6nAeM=
-modernc.org/libc v1.22.4 h1:wymSbZb0AlrjdAVX3cjreCHTPCpPARbQXNz6BHPzdwQ=
-modernc.org/libc v1.22.4/go.mod h1:jj+Z7dTNX8fBScMVNRAYZ/jF91K8fdT2hYMThc3YjBY=
 modernc.org/libc v1.22.5 h1:91BNch/e5B0uPbJFgqbxXuOnxBQjlS//icfQEGmvyjE=
 modernc.org/libc v1.22.5/go.mod h1:jj+Z7dTNX8fBScMVNRAYZ/jF91K8fdT2hYMThc3YjBY=
 modernc.org/mathutil v1.5.0 h1:rV0Ko/6SfM+8G+yKiyI830l3Wuz1zRutdslNoQ0kfiQ=
@@ -204,15 +202,11 @@ modernc.org/memory v1.5.0 h1:N+/8c5rE6EqugZwHii4IFsaJ7MUhoWX07J5tC/iI5Ds=
 modernc.org/memory v1.5.0/go.mod h1:PkUhL0Mugw21sHPeskwZW4D6VscE/GQJOnIpCnW6pSU=
 modernc.org/opt v0.1.3 h1:3XOZf2yznlhC+ibLltsDGzABUGVx8J6pnFMS3E4dcq4=
 modernc.org/opt v0.1.3/go.mod h1:WdSiB5evDcignE70guQKxYUl14mgWtbClRi5wmkkTX0=
-modernc.org/sqlite v1.21.2 h1:ixuUG0QS413Vfzyx6FWx6PYTmHaOegTY+hjzhn7L+a0=
-modernc.org/sqlite v1.21.2/go.mod h1:cxbLkB5WS32DnQqeH4h4o1B0eMr8W/y8/RGuxQ3JsC0=
 modernc.org/sqlite v1.22.1 h1:P2+Dhp5FR1RlVRkQ3dDfCiv3Ok8XPxqpe70IjYVA9oE=
 modernc.org/sqlite v1.22.1/go.mod h1:OrDj17Mggn6MhE+iPbBNf7RGKODDE9NFT0f3EwDzJqk=
 modernc.org/strutil v1.1.3 h1:fNMm+oJklMGYfU9Ylcywl0CO5O6nTfaowNsh2wpPjzY=
 modernc.org/strutil v1.1.3/go.mod h1:MEHNA7PdEnEwLvspRMtWTNnp2nnyvMfkimT1NKNAGbw=
-modernc.org/tcl v1.15.1 h1:mOQwiEK4p7HruMZcwKTZPw/aqtGM4aY00uzWhlKKYws=
 modernc.org/tcl v1.15.2 h1:C4ybAYCGJw968e+Me18oW55kD/FexcHbqH2xak1ROSY=
 modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
 modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
-modernc.org/z v1.7.0 h1:xkDw/KepgEjeizO2sNco+hqYkU12taxQFqPEmgm1GWE=
 modernc.org/z v1.7.3 h1:zDJf6iHjrnB+WRD88stbXokugjyc0/pB91ri1gO6LZY=
diff --git a/package-lock.json b/package-lock.json
index 93b6e32..6cf41cf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1200,9 +1200,9 @@
       }
     },
     "node_modules/core-js-pure": {
-      "version": "3.30.1",
-      "resolved": "https://registry.npmjs.org/core-js-pure/-/core-js-pure-3.30.1.tgz",
-      "integrity": "sha512-nXBEVpmUnNRhz83cHd9JRQC52cTMcuXAmR56+9dSMpRdpeA4I1PX6yjmhd71Eyc/wXNsdBdUDIj1QTIeZpU5Tg==",
+      "version": "3.30.2",
+      "resolved": "https://registry.npmjs.org/core-js-pure/-/core-js-pure-3.30.2.tgz",
+      "integrity": "sha512-p/npFUJXXBkCCTIlEGBdghofn00jWG6ZOtdoIXSJmAu2QBvN0IqpZXWweOytcwE6cfx8ZvVUy1vw8zxhe4Y2vg==",
       "hasInstallScript": true,
       "funding": {
         "type": "opencollective",
@@ -1670,9 +1670,9 @@
       }
     },
     "node_modules/lit": {
-      "version": "2.7.3",
-      "resolved": "https://registry.npmjs.org/lit/-/lit-2.7.3.tgz",
-      "integrity": "sha512-0a+u+vVbmgSfPu+fyvqjMPBX0Kwbyj9QOv9MbQFZhWGlV2cyk3lEwgfUQgYN+i/lx++1Z3wZknSIp3QCKxHLyg==",
+      "version": "2.7.4",
+      "resolved": "https://registry.npmjs.org/lit/-/lit-2.7.4.tgz",
+      "integrity": "sha512-cgD7xrZoYr21mbrkZIuIrj98YTMw/snJPg52deWVV4A8icLyNHI3bF70xsJeAgwTuiq5Kkd+ZR8gybSJDCPB7g==",
       "dependencies": {
         "@lit/reactive-element": "^1.6.0",
         "lit-element": "^3.3.0",
diff --git a/server/apiv1/api.go b/server/apiv1/api.go
index b1a019d..15bce45 100644
--- a/server/apiv1/api.go
+++ b/server/apiv1/api.go
@@ -657,3 +657,10 @@ func getStartLimit(req *http.Request) (start int, limit int) {
 
 	return start, limit
 }
+
+// GetOptions returns a blank response
+func GetOptions(w http.ResponseWriter, r *http.Request) {
+
+	w.Header().Set("Content-Type", "text/plain")
+	_, _ = w.Write([]byte(""))
+}
diff --git a/server/server.go b/server/server.go
index 782d190..0297507 100644
--- a/server/server.go
+++ b/server/server.go
@@ -94,6 +94,9 @@ func defaultRoutes() *mux.Router {
 	r.HandleFunc(config.Webroot+"api/v1/info", middleWareFunc(apiv1.AppInfo)).Methods("GET")
 	r.HandleFunc(config.Webroot+"api/v1/webui", middleWareFunc(apiv1.WebUIConfig)).Methods("GET")
 
+	// return blank 200 response for OPTIONS requests for CORS
+	r.PathPrefix(config.Webroot + "api/v1/").Handler(middleWareFunc(apiv1.GetOptions)).Methods("OPTIONS")
+
 	return r
 }
 
@@ -122,7 +125,7 @@ func middleWareFunc(fn http.HandlerFunc) http.HandlerFunc {
 
 		if AccessControlAllowOrigin != "" && strings.HasPrefix(r.RequestURI, config.Webroot+"api/") {
 			w.Header().Set("Access-Control-Allow-Origin", AccessControlAllowOrigin)
-			w.Header().Set("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT")
+			w.Header().Set("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS")
 			w.Header().Set("Access-Control-Allow-Headers", "*")
 		}
 
@@ -161,7 +164,7 @@ func middlewareHandler(h http.Handler) http.Handler {
 
 		if AccessControlAllowOrigin != "" && strings.HasPrefix(r.RequestURI, config.Webroot+"api/") {
 			w.Header().Set("Access-Control-Allow-Origin", AccessControlAllowOrigin)
-			w.Header().Set("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT")
+			w.Header().Set("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS")
 			w.Header().Set("Access-Control-Allow-Headers", "*")
 		}
 
diff --git a/server/ui-src/App.vue b/server/ui-src/App.vue
index c4a05d6..3e8e6a4 100644
--- a/server/ui-src/App.vue
+++ b/server/ui-src/App.vue
@@ -230,14 +230,14 @@ export default {
 						let a = d.Inline[i];
 						if (a.ContentID != '') {
 							d.HTML = d.HTML.replace(
-								new RegExp('(=["\']?)(cid:' + a.ContentID + ')(["|\'|\s|\/|>|;])', 'g'),
+								new RegExp('(=["\']?)(cid:' + a.ContentID + ')(["|\'|\\s|\\/|>|;])', 'g'),
 								'$1' + window.location.origin + window.location.pathname + 'api/v1/message/' + d.ID + '/part/' + a.PartID + '$3'
 							);
 						}
 						if (a.FileName.match(/^[a-zA-Z0-9\_\-\.]+$/)) {
 							// some old email clients use the filename
 							d.HTML = d.HTML.replace(
-								new RegExp('(=["\']?)(' + a.FileName + ')(["|\'|\s|\/|>|;])', 'g'),
+								new RegExp('(=["\']?)(' + a.FileName + ')(["|\'|\\s|\\/|>|;])', 'g'),
 								'$1' + window.location.origin + window.location.pathname + 'api/v1/message/' + d.ID + '/part/' + a.PartID + '$3'
 							);
 						}
@@ -250,14 +250,14 @@ export default {
 						let a = d.Attachments[i];
 						if (a.ContentID != '') {
 							d.HTML = d.HTML.replace(
-								new RegExp('(=["\']?)(cid:' + a.ContentID + ')(["|\'|\s|\/|>|;])', 'g'),
+								new RegExp('(=["\']?)(cid:' + a.ContentID + ')(["|\'|\\s|\\/|>|;])', 'g'),
 								'$1' + window.location.origin + window.location.pathname + 'api/v1/message/' + d.ID + '/part/' + a.PartID + '$3'
 							);
 						}
 						if (a.FileName.match(/^[a-zA-Z0-9\_\-\.]+$/)) {
 							// some old email clients use the filename
 							d.HTML = d.HTML.replace(
-								new RegExp('(=["\']?)(' + a.FileName + ')(["|\'|\s|\/|>|;])', 'g'),
+								new RegExp('(=["\']?)(' + a.FileName + ')(["|\'|\\s|\\/|>|;])', 'g'),
 								'$1' + window.location.origin + window.location.pathname + 'api/v1/message/' + d.ID + '/part/' + a.PartID + '$3'
 							);
 						}