From 04781e1f96919fd6b0681fe1d414898a6f40a6e0 Mon Sep 17 00:00:00 2001
From: TobiasMaehl-pIX <tobias@peopleix.com>
Date: Thu, 22 Jan 2026 23:43:24 +0100
Subject: [PATCH 1/2] fix(sst): don't override envs with empty bind values

---
 .changeset/hip-steaks-share.md        |  5 +++++
 packages/sst/src/cli/commands/bind.ts | 13 +++++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/hip-steaks-share.md

diff --git a/.changeset/hip-steaks-share.md b/.changeset/hip-steaks-share.md
new file mode 100644
index 000000000..5cd59183b
--- /dev/null
+++ b/.changeset/hip-steaks-share.md
@@ -0,0 +1,5 @@
+---
+"sst": patch
+---
+
+Fix sst bind to skip empty env vars so local env values aren’t overwritten
diff --git a/packages/sst/src/cli/commands/bind.ts b/packages/sst/src/cli/commands/bind.ts
index f5f8f3d50..d423bfd04 100644
--- a/packages/sst/src/cli/commands/bind.ts
+++ b/packages/sst/src/cli/commands/bind.ts
@@ -204,7 +204,7 @@ export const bind = (program: Program) =>
                 (await getLiveIamCredentials(siteConfig.role))) ||
               (await getLocalIamCredentials());
             await runCommand({
-              ...siteConfig.envs,
+              ...stripEmptyEnvValues(siteConfig.envs),
               ...credentials,
             });
           }
@@ -228,7 +228,7 @@ export const bind = (program: Program) =>
 
             const { Config } = await import("../../config.js");
             await runCommand({
-              ...constructEnvs,
+              ...stripEmptyEnvValues(constructEnvs),
               ...(await Config.env()),
               ...(await getLocalIamCredentials()),
             });
@@ -242,6 +242,15 @@ export const bind = (program: Program) =>
             });
           }
 
+          function stripEmptyEnvValues(envs) {
+            return Object.fromEntries(
+              Object.entries(envs).filter(
+                ([, value]) =>
+                  value !== undefined && value !== null && value !== ""
+              )
+            );
+          }
+
           async function getSsrSiteMetadata() {
             const [
               { metadataForStack },

From 629e75ff4ca01a2194721c4447017b206701ec26 Mon Sep 17 00:00:00 2001
From: TobiasMaehl-pIX <tobias@peopleix.com>
Date: Fri, 23 Jan 2026 00:09:38 +0100
Subject: [PATCH 2/2] fix(bind): improve stripEmptyEnvValues function

---
 packages/sst/src/cli/commands/bind.ts | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/packages/sst/src/cli/commands/bind.ts b/packages/sst/src/cli/commands/bind.ts
index d423bfd04..8dc0226df 100644
--- a/packages/sst/src/cli/commands/bind.ts
+++ b/packages/sst/src/cli/commands/bind.ts
@@ -14,8 +14,8 @@ type BIND_REASON =
   | "secrets_updated"
   | "iam_expired";
 
-class MetadataNotFoundError extends Error {}
-class MetadataOutdatedError extends Error {}
+class MetadataNotFoundError extends Error { }
+class MetadataOutdatedError extends Error { }
 
 export const bind = (program: Program) =>
   program
@@ -183,8 +183,8 @@ export const bind = (program: Program) =>
             const siteConfig = ssrSite
               ? await getSsrSiteMetadata()
               : staticSite
-              ? await getStaticSiteMetadata()
-              : await getServiceMetadata();
+                ? await getStaticSiteMetadata()
+                : await getServiceMetadata();
 
             // Handle rebind due to metadata updated
             if (reason === "metadata_updated") {
@@ -242,13 +242,16 @@ export const bind = (program: Program) =>
             });
           }
 
-          function stripEmptyEnvValues(envs) {
-            return Object.fromEntries(
-              Object.entries(envs).filter(
-                ([, value]) =>
-                  value !== undefined && value !== null && value !== ""
-              )
-            );
+          function stripEmptyEnvValues(
+            envs: Record<string, string | undefined | null> | undefined
+          ): Record<string, string> {
+            const result: Record<string, string> = {};
+            for (const [key, value] of Object.entries(envs ?? {})) {
+              if (value !== undefined && value !== null && value !== "") {
+                result[key] = value;
+              }
+            }
+            return result;
           }
 
           async function getSsrSiteMetadata() {