diff --git a/changelog/29978.txt b/changelog/29978.txt
new file mode 100644
index 0000000000..03c0d289ef
--- /dev/null
+++ b/changelog/29978.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+plugins: plugin registration should honor the `plugin_tmpdir` config
+```
\ No newline at end of file
diff --git a/vault/plugincatalog/plugin_catalog_stubs_oss.go b/vault/plugincatalog/plugin_catalog_stubs_oss.go
index 12673393f7..5f15a10040 100644
--- a/vault/plugincatalog/plugin_catalog_stubs_oss.go
+++ b/vault/plugincatalog/plugin_catalog_stubs_oss.go
@@ -52,6 +52,7 @@ func (c *PluginCatalog) setInternal(ctx context.Context, plugin pluginutil.SetPl
 		Env:      plugin.Env,
 		Sha256:   plugin.Sha256,
 		Builtin:  false,
+		Tmpdir:   c.tmpdir,
 	}
 	if entryTmp.OCIImage != "" && entryTmp.Runtime != "" {
 		var err error
@@ -112,6 +113,7 @@ func (c *PluginCatalog) setInternal(ctx context.Context, plugin pluginutil.SetPl
 		Env:      plugin.Env,
 		Sha256:   plugin.Sha256,
 		Builtin:  false,
+		Tmpdir:   c.tmpdir,
 	}
 
 	buf, err := json.Marshal(entry)