diff --git a/go.mod b/go.mod
index 3b47a0e8..f0f2c3ed 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/credentials v1.19.24
 	github.com/aws/aws-sdk-go-v2/feature/s3/transfermanager v0.2.11
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.104.0
-	github.com/aws/smithy-go v1.27.2
+	github.com/aws/smithy-go v1.27.3
 	github.com/cbergoon/merkletree v0.2.0
 	github.com/cilium/ebpf v0.21.0
 	github.com/cncf/xds/go v0.0.0-20260202195803-dba9d589def2
diff --git a/go.sum b/go.sum
index d157e014..eff545b6 100644
--- a/go.sum
+++ b/go.sum
@@ -106,6 +106,8 @@ github.com/aws/smithy-go v1.26.0 h1:9ouqbi+NyKP7fV3Te7UElCwdAb6Y8uk7LGwPE5tVe/s=
 github.com/aws/smithy-go v1.26.0/go.mod h1:YE2RhdIuDbA5E5bTdciG9KrW3+TiEONeUWCqxX9i1Fc=
 github.com/aws/smithy-go v1.27.2 h1:y9NPmSE6am6LjEFPfqHqG/jJk7AauQvhCJONKh7kpzk=
 github.com/aws/smithy-go v1.27.2/go.mod h1:YE2RhdIuDbA5E5bTdciG9KrW3+TiEONeUWCqxX9i1Fc=
+github.com/aws/smithy-go v1.27.3 h1:F3Zb497UhhskkfpJmfkXswyo+t0sh9OTBnIHjogWbVY=
+github.com/aws/smithy-go v1.27.3/go.mod h1:YE2RhdIuDbA5E5bTdciG9KrW3+TiEONeUWCqxX9i1Fc=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/brianvoe/gofakeit/v6 v6.28.0 h1:Xib46XXuQfmlLS2EXRuJpqcw8St6qSZz75OUo0tgAW4=
diff --git a/vendor/github.com/aws/smithy-go/CHANGELOG.md b/vendor/github.com/aws/smithy-go/CHANGELOG.md
index fe8409e5..1c96bba2 100644
--- a/vendor/github.com/aws/smithy-go/CHANGELOG.md
+++ b/vendor/github.com/aws/smithy-go/CHANGELOG.md
@@ -1,3 +1,12 @@
+# Release (2026-06-26)
+
+## General Highlights
+* **Dependency Update**: Updated to the latest SDK module versions
+
+## Module Highlights
+* `github.com/aws/smithy-go`: v1.27.3
+  * **Bug Fix**: Fix bug in JSON doc encoder and endpoint host label format validation
+
 # Release (2026-06-05)
 
 ## General Highlights
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/value.go b/vendor/github.com/aws/smithy-go/encoding/json/value.go
index b41ff1e1..eac49c44 100644
--- a/vendor/github.com/aws/smithy-go/encoding/json/value.go
+++ b/vendor/github.com/aws/smithy-go/encoding/json/value.go
@@ -106,6 +106,11 @@ func (jv Value) BigInteger(v *big.Int) {
 
 // BigDecimal encodes v as JSON value
 func (jv Value) BigDecimal(v *big.Float) {
+	if v.Sign() == 0 && v.Signbit() {
+		// Preserve negative zero sign which Int64() would lose.
+		jv.w.Write([]byte("-0"))
+		return
+	}
 	if i, accuracy := v.Int64(); accuracy == big.Exact {
 		jv.Long(i)
 		return
diff --git a/vendor/github.com/aws/smithy-go/endpoints/private/rulesfn/uri.go b/vendor/github.com/aws/smithy-go/endpoints/private/rulesfn/uri.go
index 0c115412..68828dbf 100644
--- a/vendor/github.com/aws/smithy-go/endpoints/private/rulesfn/uri.go
+++ b/vendor/github.com/aws/smithy-go/endpoints/private/rulesfn/uri.go
@@ -27,6 +27,9 @@ func IsValidHostLabel(input string, allowSubDomains bool) bool {
 		if !smithyhttp.ValidHostLabel(label) {
 			return false
 		}
+		if label[0] == '-' || label[len(label)-1] == '-' {
+			return false
+		}
 	}
 
 	return true
diff --git a/vendor/github.com/aws/smithy-go/go_module_metadata.go b/vendor/github.com/aws/smithy-go/go_module_metadata.go
index 8b6dcf92..c9230c66 100644
--- a/vendor/github.com/aws/smithy-go/go_module_metadata.go
+++ b/vendor/github.com/aws/smithy-go/go_module_metadata.go
@@ -3,4 +3,4 @@
 package smithy
 
 // goModuleVersion is the tagged release for this module
-const goModuleVersion = "1.27.2"
+const goModuleVersion = "1.27.3"
diff --git a/vendor/github.com/aws/smithy-go/transport/http/host.go b/vendor/github.com/aws/smithy-go/transport/http/host.go
index db9801be..b504a455 100644
--- a/vendor/github.com/aws/smithy-go/transport/http/host.go
+++ b/vendor/github.com/aws/smithy-go/transport/http/host.go
@@ -69,7 +69,7 @@ func ValidPortNumber(port string) bool {
 	return true
 }
 
-// ValidHostLabel returns whether the label is a valid RFC 3986 host label.
+// ValidHostLabel returns whether the label is a valid RFC 952/1123 host label.
 func ValidHostLabel(label string) bool {
 	if l := len(label); l == 0 || l > 63 {
 		return false
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 28b6eb01..650d009e 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -145,7 +145,7 @@ github.com/aws/aws-sdk-go-v2/service/ssooidc/types
 github.com/aws/aws-sdk-go-v2/service/sts
 github.com/aws/aws-sdk-go-v2/service/sts/internal/endpoints
 github.com/aws/aws-sdk-go-v2/service/sts/types
-# github.com/aws/smithy-go v1.27.2
+# github.com/aws/smithy-go v1.27.3
 ## explicit; go 1.24
 github.com/aws/smithy-go
 github.com/aws/smithy-go/auth