diff --git a/changelog.md b/changelog.md
index f1c2659862..fde7948ab8 100644
--- a/changelog.md
+++ b/changelog.md
@@ -10,7 +10,11 @@ and this project adheres to
 
 ### Security
 
-Addressed all known, fixable CVEs.
+- Addressed all known, fixable CVEs.
+
+### Fixed
+
+- Fixed occasional panic due to a concurrent map read/write during runtime setup.
 
 ## 0.48.0
 
diff --git a/pkg/runtime/depot.go b/pkg/runtime/depot.go
index 97284343ec..c67b46eed4 100644
--- a/pkg/runtime/depot.go
+++ b/pkg/runtime/depot.go
@@ -160,6 +160,9 @@ func (d *depot) SetCacheSize(mb int) {
 // Artifact metadata comes from the depot's cache, and may not exist for installed artifacts that
 // predate the cache.
 func (d *depot) Exists(id strfmt.UUID) (bool, *artifactInfo) {
+	d.mapMutex.Lock()
+	defer d.mapMutex.Unlock()
+
 	if _, ok := d.artifacts[id]; ok {
 		if artifact, exists := d.config.Cache[id]; exists {
 			return true, artifact