diff --git a/scripts/check-client-bundle-secrets.mjs b/scripts/check-client-bundle-secrets.mjs
index 9319a103f..a007ab333 100644
--- a/scripts/check-client-bundle-secrets.mjs
+++ b/scripts/check-client-bundle-secrets.mjs
@@ -11,9 +11,12 @@ const forbiddenMarkers = [
   "OPENAI_ORG_ID",
   "OPENAI_PROJECT_ID",
   "RAG_QUERY_HASH_SECRET",
-  "sb_secret_",
-  "sk-proj-",
-  "sk-svcacct-",
+  // Match an actual key value (prefix + key body), not a bare prefix-check
+  // string literal. @supabase/supabase-js ships `key.startsWith('sb_secret_')`
+  // client-side as of 2.110.x, which would otherwise be a false positive here.
+  /sb_secret_[A-Za-z0-9]/,
+  /sk-proj-[A-Za-z0-9]/,
+  /sk-svcacct-[A-Za-z0-9]/,
 ];
 
 function textFiles(root) {
@@ -47,9 +50,11 @@ const offenders = new Map();
 for (const file of [...textFiles(publicRoot), ...textFiles(clientBuildRoot)]) {
   const content = readFileSync(file, "utf8");
   for (const marker of forbiddenMarkers) {
-    if (content.includes(marker)) {
+    const matched = marker instanceof RegExp ? marker.test(content) : content.includes(marker);
+    if (matched) {
+      const markerLabel = marker instanceof RegExp ? marker.source : marker;
       const relativePath = relative(projectRoot, file).replaceAll("\\", "/");
-      offenders.set(`${relativePath}\0${marker}`, { marker, relativePath });
+      offenders.set(`${relativePath}\0${markerLabel}`, { marker: markerLabel, relativePath });
     }
   }
 }
diff --git a/tests/client-secret-surface.test.ts b/tests/client-secret-surface.test.ts
index 9db8dcf02..8f911214c 100644
--- a/tests/client-secret-surface.test.ts
+++ b/tests/client-secret-surface.test.ts
@@ -169,6 +169,23 @@ describe("client environment isolation", () => {
       expect(publicResult.status).toBe(1);
       expect(publicResult.stderr).toContain("public/unsafe.txt");
       expect(publicResult.stderr).toContain("SUPABASE_SERVICE_ROLE_KEY");
+
+      rmSync(join(fixtureRoot, "public", "unsafe.txt"));
+      // @supabase/supabase-js ships a bare `key.startsWith('sb_secret_')` prefix
+      // check client-side; that literal alone must not trip the scanner.
+      writeFileSync(
+        join(staticRoot, "sdk-prefix-check.js"),
+        "const isNewApiKey = (key) => key.startsWith(\"sb_publishable_\") || key.startsWith(\"sb_secret_\");",
+        "utf8",
+      );
+      const prefixOnlyResult = spawnSync(process.execPath, [scannerPath], { cwd: fixtureRoot, encoding: "utf8" });
+      expect(prefixOnlyResult.status).toBe(0);
+
+      rmSync(join(staticRoot, "sdk-prefix-check.js"));
+      writeFileSync(join(staticRoot, "leaked-key.js"), "const key = 'sb_secret_abc123DEF456';", "utf8");
+      const leakedKeyResult = spawnSync(process.execPath, [scannerPath], { cwd: fixtureRoot, encoding: "utf8" });
+      expect(leakedKeyResult.status).toBe(1);
+      expect(leakedKeyResult.stderr).toContain(".next/static/leaked-key.js");
     } finally {
       rmSync(fixtureRoot, { recursive: true, force: true });
     }