diff --git a/api/go.mod b/api/go.mod
index 605ae6bdd439c..b9c23b8d3783d 100644
--- a/api/go.mod
+++ b/api/go.mod
@@ -14,7 +14,7 @@ require (
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/hashicorp/go-retryablehttp v0.6.6
 	github.com/hashicorp/go-rootcerts v1.0.2
-	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.1
+	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4
 	github.com/hashicorp/hcl v1.0.0
 	github.com/hashicorp/vault/sdk v0.4.1
 	github.com/mitchellh/mapstructure v1.4.2
diff --git a/api/go.sum b/api/go.sum
index 40e971e311ef1..9d54aa4c7fb21 100644
--- a/api/go.sum
+++ b/api/go.sum
@@ -113,8 +113,9 @@ github.com/hashicorp/go-rootcerts v1.0.2/go.mod h1:pqUvnprVnM5bf7AOirdbb01K4ccR3
 github.com/hashicorp/go-secure-stdlib/base62 v0.1.1/go.mod h1:EdWO6czbmthiwZ3/PUsDV+UD1D5IRU4ActiaWGwt0Yw=
 github.com/hashicorp/go-secure-stdlib/mlock v0.1.1 h1:cCRo8gK7oq6A2L6LICkUZ+/a5rLiRXFMf1Qd4xSwxTc=
 github.com/hashicorp/go-secure-stdlib/mlock v0.1.1/go.mod h1:zq93CJChV6L9QTfGKtfBxKqD7BqqXx5O04A/ns2p5+I=
-github.com/hashicorp/go-secure-stdlib/parseutil v0.1.1 h1:78ki3QBevHwYrVxnyVeaEz+7WtifHhauYF23es/0KlI=
 github.com/hashicorp/go-secure-stdlib/parseutil v0.1.1/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4 h1:hrIH/qrOTHfG9a1Jz6Z2jQf7Xe77AaD464W1fCFLwPQ=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
 github.com/hashicorp/go-secure-stdlib/password v0.1.1/go.mod h1:9hH302QllNwu1o2TGYtSk8I8kTAN0ca1EHpwhm5Mmzo=
 github.com/hashicorp/go-secure-stdlib/strutil v0.1.1 h1:nd0HIW15E6FG1MsnArYaHfuw9C2zgzM8LxkG5Ty/788=
 github.com/hashicorp/go-secure-stdlib/strutil v0.1.1/go.mod h1:gKOamz3EwoIoJq7mlMIRBpVTAUn8qPCrEclOKKWhD3U=
diff --git a/changelog/14522.txt b/changelog/14522.txt
new file mode 100644
index 0000000000000..420a9838cf9ff
--- /dev/null
+++ b/changelog/14522.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+core: Fix panic caused by parsing JSON integers for fields defined as comma-delimited strings
+```
diff --git a/go.mod b/go.mod
index 9b7549a7580e6..85011070cb5a7 100644
--- a/go.mod
+++ b/go.mod
@@ -75,7 +75,7 @@ require (
 	github.com/hashicorp/go-secure-stdlib/gatedwriter v0.1.1
 	github.com/hashicorp/go-secure-stdlib/kv-builder v0.1.1
 	github.com/hashicorp/go-secure-stdlib/mlock v0.1.2
-	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.3
+	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4
 	github.com/hashicorp/go-secure-stdlib/password v0.1.1
 	github.com/hashicorp/go-secure-stdlib/reloadutil v0.1.1
 	github.com/hashicorp/go-secure-stdlib/strutil v0.1.2
diff --git a/go.sum b/go.sum
index f02a646f80a92..3242ce0129242 100644
--- a/go.sum
+++ b/go.sum
@@ -882,8 +882,8 @@ github.com/hashicorp/go-secure-stdlib/mlock v0.1.2 h1:p4AKXPPS24tO8Wc8i1gLvSKdmk
 github.com/hashicorp/go-secure-stdlib/mlock v0.1.2/go.mod h1:zq93CJChV6L9QTfGKtfBxKqD7BqqXx5O04A/ns2p5+I=
 github.com/hashicorp/go-secure-stdlib/parseutil v0.1.1/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
 github.com/hashicorp/go-secure-stdlib/parseutil v0.1.2/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
-github.com/hashicorp/go-secure-stdlib/parseutil v0.1.3 h1:geBw3SBrxQq+buvbf4K+Qltv1gjaXJxy8asD4CjGYow=
-github.com/hashicorp/go-secure-stdlib/parseutil v0.1.3/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4 h1:hrIH/qrOTHfG9a1Jz6Z2jQf7Xe77AaD464W1fCFLwPQ=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
 github.com/hashicorp/go-secure-stdlib/password v0.1.1 h1:6JzmBqXprakgFEHwBgdchsjaA9x3GyjdI568bXKxa60=
 github.com/hashicorp/go-secure-stdlib/password v0.1.1/go.mod h1:9hH302QllNwu1o2TGYtSk8I8kTAN0ca1EHpwhm5Mmzo=
 github.com/hashicorp/go-secure-stdlib/reloadutil v0.1.1 h1:SMGUnbpAcat8rIKHkBPjfv81yC46a8eCNZ2hsR2l1EI=
diff --git a/sdk/framework/field_data_test.go b/sdk/framework/field_data_test.go
index 7e3c9d1676171..60ffa08232f23 100644
--- a/sdk/framework/field_data_test.go
+++ b/sdk/framework/field_data_test.go
@@ -1,6 +1,7 @@
 package framework
 
 import (
+	"encoding/json"
 	"net/http"
 	"reflect"
 	"testing"
@@ -855,6 +856,18 @@ func TestFieldDataGet(t *testing.T) {
 			false,
 		},
 
+		"comma string slice type, single JSON number value": {
+			map[string]*FieldSchema{
+				"foo": {Type: TypeCommaStringSlice},
+			},
+			map[string]interface{}{
+				"foo": json.Number("123"),
+			},
+			"foo",
+			[]string{"123"},
+			false,
+		},
+
 		"type kv pair, not supplied": {
 			map[string]*FieldSchema{
 				"foo": {Type: TypeKVPairs},
diff --git a/sdk/go.mod b/sdk/go.mod
index 0aa17297c95c0..40194825a81e8 100644
--- a/sdk/go.mod
+++ b/sdk/go.mod
@@ -20,7 +20,7 @@ require (
 	github.com/hashicorp/go-plugin v1.4.3
 	github.com/hashicorp/go-secure-stdlib/base62 v0.1.1
 	github.com/hashicorp/go-secure-stdlib/mlock v0.1.1
-	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.1
+	github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4
 	github.com/hashicorp/go-secure-stdlib/password v0.1.1
 	github.com/hashicorp/go-secure-stdlib/strutil v0.1.1
 	github.com/hashicorp/go-secure-stdlib/tlsutil v0.1.1
diff --git a/sdk/go.sum b/sdk/go.sum
index 396026093e988..957410de74d32 100644
--- a/sdk/go.sum
+++ b/sdk/go.sum
@@ -109,6 +109,8 @@ github.com/hashicorp/go-secure-stdlib/mlock v0.1.1 h1:cCRo8gK7oq6A2L6LICkUZ+/a5r
 github.com/hashicorp/go-secure-stdlib/mlock v0.1.1/go.mod h1:zq93CJChV6L9QTfGKtfBxKqD7BqqXx5O04A/ns2p5+I=
 github.com/hashicorp/go-secure-stdlib/parseutil v0.1.1 h1:78ki3QBevHwYrVxnyVeaEz+7WtifHhauYF23es/0KlI=
 github.com/hashicorp/go-secure-stdlib/parseutil v0.1.1/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4 h1:hrIH/qrOTHfG9a1Jz6Z2jQf7Xe77AaD464W1fCFLwPQ=
+github.com/hashicorp/go-secure-stdlib/parseutil v0.1.4/go.mod h1:QmrqtbKuxxSWTN3ETMPuB+VtEiBJ/A9XhoYGv8E1uD8=
 github.com/hashicorp/go-secure-stdlib/password v0.1.1 h1:6JzmBqXprakgFEHwBgdchsjaA9x3GyjdI568bXKxa60=
 github.com/hashicorp/go-secure-stdlib/password v0.1.1/go.mod h1:9hH302QllNwu1o2TGYtSk8I8kTAN0ca1EHpwhm5Mmzo=
 github.com/hashicorp/go-secure-stdlib/strutil v0.1.1 h1:nd0HIW15E6FG1MsnArYaHfuw9C2zgzM8LxkG5Ty/788=