@@ -0,0 +1,15 @@
+---
+'@objectstack/cli': patch
+'create-objectstack': patch
+---
+
+fix(cli,create-objectstack): new projects override `uuid` below 12.0.0 to `^11.1.1`, so `npm audit` lists no GHSA-w5hq-g745-h8pq entry
+
+Clause-②: no
+Metadata-protocol: none
+
+`@objectstack/rest` depends on `exceljs ^4.4.0`, and exceljs 4.4.0, its newest release, depends on `uuid ^8.3.0`. GHSA-w5hq-g745-h8pq affects `uuid` below 11.1.1, so `npm audit` in a fresh npm-installed scaffold reported 9 moderate entries, all from that one advisory. The npm `overrides` block every standalone scaffold emits now carries `"uuid@<12.0.0": "^11.1.1"`: the `create-objectstack` blank template, `os init` (`-t app`, `-t plugin`, `-t empty`) and `os create plugin`. A new project resolves `uuid` 11.1.1 and `npm audit` lists no `uuid` entry, measured on npm 10.9.9 and 11.21.1. exceljs calls only `uuid`'s `v4()`, which `uuid` 11 keeps; exceljs's buffered and streaming writers, its loader and `@objectstack/rest`'s `parseXlsxToRows` were run on the installed tree. pnpm ignores npm's `overrides` field.
+
+The selector stops at `<12.0.0`, so a project can still add a newer `uuid` of its own: `npm install uuid@14` installs. A spec-less `npm install uuid` is refused with `EOVERRIDE` (npm reads it as `uuid@*`, which meets the selector); name the major instead.
+
+**An existing project made by an earlier `create-objectstack`, `os init` or `os create plugin`**, or any other npm project that installs `@objectstack/rest`, directly or through `@objectstack/runtime`, `@objectstack/cli`, `@objectstack/plugin-auth` or `@objectstack/verify`: add `"uuid@<12.0.0": "^11.1.1"` to the `overrides` block of its root `package.json` and run `npm install`. npm reads `overrides` only from the root manifest, so no `@objectstack/*` release can apply it for you.
@@ -434,13 +434,89 @@ export const SCAFFOLD_TYPESCRIPT_RANGE = '^5.3.0';
  */
 export const SCAFFOLD_VITEST_RANGE = '~4.1.12';
 
+/**
+ * The npm `overrides` SELECTOR that routes `uuid` out of GHSA-w5hq-g745-h8pq,
+ * and the range it routes to ({@link SCAFFOLD_UUID_OVERRIDE_RANGE}).
+ *
+ * The advisory affects `uuid` below 11.1.1 (and 12.0.0 and 13.0.0, fixed in
+ * 12.0.1 and 13.0.1). A scaffold reaches it through ONE edge:
+ * `@objectstack/cli`, `@objectstack/runtime`, `@objectstack/plugin-auth` and
+ * `@objectstack/verify` depend on `@objectstack/rest`, which depends on
+ * `exceljs ^4.4.0`, which depends on `uuid ^8.3.0`. exceljs
+ * 4.4.0 is its newest release, and its only later one, `4.4.1-prerelease.0`,
+ * declares `uuid ^8.3.0` too, so no exceljs upgrade leaves the 8.x line.
+ *
+ * Why the scaffold and not `@objectstack/rest` itself: npm reads `overrides`
+ * only from the ROOT manifest of an install. Measured 2026-10-22, each manifest
+ * in an empty directory with a fresh `--cache`: the published
+ * `@objectstack/rest` 18.0.0 repacked with `"overrides": { "uuid": "^11.1.1" }`
+ * and installed as a dependency still resolves `uuid` 8.3.2 on npm 10.9.9 and
+ * 11.21.1, and `npm audit` reports the same 3 entries as the unmodified
+ * package. The monorepo's own `pnpm-workspace.yaml` override (the same
+ * selector and range as here) has the same limit: it never reaches an npm
+ * consumer. This block reaches the projects the scaffolders create, and no
+ * other npm consumer of `@objectstack/rest`.
+ *
+ * The selector is `uuid@<12.0.0`, not a bare `uuid`, so that it rewrites only
+ * edges that can resolve below the fix, and it stops at the major boundary so
+ * that a later advisory on the 11.x line moves the range alone. It also leaves
+ * a project free to add a newer `uuid` of its own. Measured on a consumer of
+ * the published `@objectstack/rest` 18.0.0, npm 10.9.9 and 11.21.1: with this
+ * selector, a later `npm install uuid@14` exits 0, declares `^14.0.3`, and
+ * exceljs keeps `uuid` 11.1.1; with a bare `uuid` key it exits 1 with
+ * `EOVERRIDE`. A spec-less `npm install uuid` exits 1 with `EOVERRIDE:
+ * Override for uuid@* conflicts with direct dependency` under either key,
+ * because npm reads it as `uuid@*`, which meets `<12.0.0`. Naming the major is
+ * the fix, the same cost the `vitest` entry carries.
+ *
+ * Safe at runtime because exceljs calls exactly one `uuid` export, `v4()`, with
+ * no arguments (`lib/xlsx/xform/sheet/cf-ext/cf-rule-ext-xform.js`), and
+ * `uuid` 11 keeps it. The monorepo's own suites already run exceljs on `uuid`
+ * 11.1.1 through the workspace override.
+ */
+export const SCAFFOLD_UUID_OVERRIDE_SELECTOR = 'uuid@<12.0.0';
+
+/**
+ * The `uuid` range {@link SCAFFOLD_UUID_OVERRIDE_SELECTOR} routes to: the
+ * `legacy-11` line from its first release outside GHSA-w5hq-g745-h8pq, the
+ * same target as the workspace override, so a scaffold resolves the `uuid` the
+ * monorepo's own exceljs suites run on.
+ *
+ * Measured 2026-10-22, each manifest in an empty directory with a fresh
+ * `--cache`, the `@objectstack/*` ranges resolving to the published 18.0.0
+ * (blank template, `os init -t app`, `-t plugin` and `-t empty`):
+ *
+ *   without the entry   npm 10.9.9, 11.21.1   exit 0, `uuid` 8.3.2; `npm
+ *                                             audit` reports 9 moderate entries,
+ *                                             all GHSA-w5hq-g745-h8pq
+ *   with the entry      npm 10.9.9, 11.21.1   exit 0, `uuid` 11.1.1; `npm
+ *                                             audit` lists no `uuid` entry
+ *
+ * `os create plugin` has no `@objectstack/rest` in its closure and audits
+ * clean either way; the entry is inert there. Under the entry, exceljs's
+ * buffered write (with a rule that calls `v4()`), its streaming
+ * `WorkbookWriter`, its buffered load and `@objectstack/rest`'s own
+ * `parseXlsxToRows` ran on the installed tree, on both npm versions.
+ *
+ * The re-check that lets this go: `npm ls uuid --all` in an emitted `-t app`
+ * install WITHOUT the entry, on the newest npm 10 and on npm 11. When no path
+ * resolves a `uuid` inside the advisory's range, delete it here, in
+ * {@link SCAFFOLD_NPM_OVERRIDES}, and its `POLICY_STAMPS` row together.
+ */
+export const SCAFFOLD_UUID_OVERRIDE_RANGE = '^11.1.1';
+
 /**
  * The npm `overrides` block every STANDALONE scaffold emits: `os init`'s three
  * templates, `os create plugin` outside the monorepo, and — by generation, not
- * import — `create-objectstack`'s bundled template (the `overrides.vitest` row
- * in `scripts/sync-scaffold-emission-policy.mjs`'s `POLICY_STAMPS`).
+ * import — `create-objectstack`'s bundled template (the `overrides.vitest` and
+ * `overrides.uuid@<12.0.0` rows in `scripts/sync-scaffold-emission-policy.mjs`'s
+ * `POLICY_STAMPS`).
+ *
+ * It carries two entries with two reasons. `uuid` is the advisory route on
+ * {@link SCAFFOLD_UUID_OVERRIDE_SELECTOR}. The rest of this comment is about
+ * `vitest`.
  *
- * Why it exists. vitest 4.1.12 (published 2026-10-15) peers
+ * Why the `vitest` entry exists. vitest 4.1.12 (published 2026-10-15) peers
  * `@vitest/browser-webdriverio ^4.1.11`, and that package's only match, 4.1.11,
  * peers `vitest: 4.1.11` exactly — a peer set that contradicts itself. A
  * scaffold reaches it through its own root vitest, now that the range is
@@ -487,6 +563,7 @@ export const SCAFFOLD_VITEST_RANGE = '~4.1.12';
  */
 export const SCAFFOLD_NPM_OVERRIDES: Readonly<Record<string, string>> = Object.freeze({
   vitest: SCAFFOLD_VITEST_RANGE,
+  [SCAFFOLD_UUID_OVERRIDE_SELECTOR]: SCAFFOLD_UUID_OVERRIDE_RANGE,
 });
 
 /** The `@types/node` range a scaffolded project declares. */
@@ -570,7 +647,8 @@ export function renderScaffoldPackageJson(
     dependencies: template.dependencies,
     devDependencies: template.devDependencies,
     // Every template, whether or not it declares vitest itself — without it
-    // npm 10 cannot install any of them (see SCAFFOLD_NPM_OVERRIDES).
+    // npm 10 cannot install any of them, and `npm audit` reports the `uuid`
+    // advisory exceljs pulls in (see SCAFFOLD_NPM_OVERRIDES).
     overrides: { ...SCAFFOLD_NPM_OVERRIDES },
   };
 }
 
@@ -78,6 +78,7 @@ import { childEnv } from './helpers/serve-process.js';
 import {
   renderScaffoldPackageJson,
   renderScaffoldTsconfig,
+  SCAFFOLD_NPM_OVERRIDES,
   SCAFFOLD_PNPM_RANGE,
   SCAFFOLD_TSCONFIG_INCLUDE_WITH_ROOT_CONFIG,
   SCAFFOLD_TYPES_NODE_RANGE,
@@ -421,6 +422,25 @@ describe('the on-ramp emits the same policy — measured by DRIVING it', () => {
     ]);
   });
 
+  it('emits ONE npm overrides block across ALL THREE scaffolders, and it IS SCAFFOLD_NPM_OVERRIDES', () => {
+    // The on-ramp receives its block by GENERATION, value by value, from
+    // `POLICY_STAMPS` rows whose KEYS are spelled in the stamp script, the
+    // `uuid@<12.0.0` selector among them. Its `--check` holds each VALUE to
+    // the policy and cannot see a key spelled differently from the constant
+    // `os init` and `os create` emit from. Comparing whole blocks here can.
+    const expected = { ...SCAFFOLD_NPM_OVERRIDES };
+    // Control: the block names more than vitest, so a comparison that only
+    // ever met `{ vitest }` cannot pass for this one.
+    expect(Object.keys(expected).length).toBeGreaterThan(1);
+    for (const { id, manifest } of allScaffolderManifests()) {
+      expect(
+        manifest.overrides,
+        `${id} must emit the shared npm overrides block. The on-ramp reaches it by generation: ` +
+          'run `pnpm gen:scaffold-emission-policy`, and keep each POLICY_STAMPS override key equal to its constant',
+      ).toEqual(expected);
+    }
+  });
+
   it('carries the committed template through unchanged — the generator ran, the build copied', () => {
     // The one place the committed template is read, and deliberately as a
     // CONSEQUENCE rather than as the expectation: the drive above already
 
@@ -2,7 +2,8 @@
 
 /**
  * PIN — every standalone manifest `os init` and `os create` emit carries the
- * npm `overrides` block, built from the one vitest constant.
+ * npm `overrides` block, built from the vitest constant and the two `uuid`
+ * constants (the `uuid` entry is an advisory route; its pins are at the end).
  *
  * ## The defect
  *
@@ -26,8 +27,8 @@
  * Every equality is DERIVED from the exported constants, never a literal: a
  * pin comparing against a spelled-out range would stay green on a tree where
  * the constant moved and one emission was left behind — the drift it exists
- * to catch. The one literal is a LOWER bound, the advisory's fixed release, in
- * the floor pin at the end of this file.
+ * to catch. The literals are LOWER bounds, the advisories' fixed releases, in
+ * the floor pins at the end of this file.
  *
  *   1. Each emission's `overrides.vitest` IS `SCAFFOLD_VITEST_RANGE`.
  *   2. Where an emission also declares `vitest` directly, the two are equal —
@@ -47,6 +48,8 @@ import { describe, it, expect } from 'vitest';
 import {
   renderScaffoldPackageJson,
   SCAFFOLD_NPM_OVERRIDES,
+  SCAFFOLD_UUID_OVERRIDE_RANGE,
+  SCAFFOLD_UUID_OVERRIDE_SELECTOR,
   SCAFFOLD_VITEST_RANGE,
   TEMPLATES,
 } from '../src/commands/init.js';
@@ -84,8 +87,10 @@ describe('npm overrides in every standalone scaffold manifest', () => {
     expect(direct.map((m) => m.id)).toEqual(expect.arrayContaining(['os init -t plugin', 'os create plugin']));
   });
 
-  it('the override map is built from the vitest constant', () => {
+  it('the override map is built from the vitest and uuid constants, and nothing else', () => {
     expect(SCAFFOLD_NPM_OVERRIDES.vitest).toBe(SCAFFOLD_VITEST_RANGE);
+    expect(SCAFFOLD_NPM_OVERRIDES[SCAFFOLD_UUID_OVERRIDE_SELECTOR]).toBe(SCAFFOLD_UUID_OVERRIDE_RANGE);
+    expect(Object.keys(SCAFFOLD_NPM_OVERRIDES).sort()).toEqual(['vitest', SCAFFOLD_UUID_OVERRIDE_SELECTOR].sort());
     expect(Object.isFrozen(SCAFFOLD_NPM_OVERRIDES)).toBe(true);
   });
 
@@ -143,3 +148,47 @@ describe('the scaffold vitest range stays outside GHSA-qxg6-89mg-rqv8', () => {
     expect(atOrAbove, `SCAFFOLD_VITEST_RANGE "${SCAFFOLD_VITEST_RANGE}" admits ${floor.join('.')}, below the fix ${fixed!.join('.')}`).toBe(true);
   });
 });
+
+/**
+ * The `uuid` override must keep routing exceljs's `uuid ^8.3.0` (reached
+ * through `@objectstack/rest`) out of GHSA-w5hq-g745-h8pq. The advisory affects
+ * `uuid` below 11.1.1, and 12.0.0 and 13.0.0; the fixed releases are 11.1.1,
+ * 12.0.1 and 13.0.1 (read from the npm registry's bulk advisory endpoint,
+ * 2026-10-22).
+ * Two properties, both read off the constants:
+ *
+ *   1. The TARGET's lowest admitted version is at or above the fix for its
+ *      major. A major with no row is refused: moving the target there is the
+ *      moment to read the advisory for that line.
+ *   2. The SELECTOR is `uuid@<M.0.0` with M the major right above the target,
+ *      so every edge that can resolve below the fix is rewritten (the
+ *      exceljs edge is `^8.3.0`), and a later advisory on the target line
+ *      moves the target alone.
+ */
+const UUID_FIXED_FLOOR_BY_MAJOR: Readonly<Record<number, readonly [number, number, number]>> = {
+  11: [11, 1, 1],
+  12: [12, 0, 1],
+  13: [13, 0, 1],
+};
+
+describe('the scaffold uuid override stays outside GHSA-w5hq-g745-h8pq', () => {
+  it('its target admits nothing below the advisory fix for its major', () => {
+    const match = /^\^(\d+)\.(\d+)\.(\d+)$/.exec(SCAFFOLD_UUID_OVERRIDE_RANGE);
+    expect(match, `SCAFFOLD_UUID_OVERRIDE_RANGE "${SCAFFOLD_UUID_OVERRIDE_RANGE}" is not a ^X.Y.Z range`).not.toBeNull();
+    const floor = match!.slice(1).map(Number) as [number, number, number];
+    const fixed = UUID_FIXED_FLOOR_BY_MAJOR[floor[0]];
+    expect(fixed, `no advisory floor is recorded for uuid ${floor[0]}.x — read the advisory, then add the row`).toBeDefined();
+    const atOrAbove = floor[1] !== fixed![1] ? floor[1] > fixed![1] : floor[2] >= fixed![2];
+    expect(
+      atOrAbove,
+      `SCAFFOLD_UUID_OVERRIDE_RANGE "${SCAFFOLD_UUID_OVERRIDE_RANGE}" admits ${floor.join('.')}, below the fix ${fixed!.join('.')}`,
+    ).toBe(true);
+  });
+
+  it('its selector covers every version below the target line, bounded at the next major', () => {
+    const selector = /^uuid@<(\d+)\.0\.0$/.exec(SCAFFOLD_UUID_OVERRIDE_SELECTOR);
+    expect(selector, `SCAFFOLD_UUID_OVERRIDE_SELECTOR "${SCAFFOLD_UUID_OVERRIDE_SELECTOR}" is not uuid@<M.0.0`).not.toBeNull();
+    const targetMajor = Number(/^\^(\d+)\./.exec(SCAFFOLD_UUID_OVERRIDE_RANGE)?.[1]);
+    expect(Number(selector![1])).toBe(targetMajor + 1);
+  });
+});
@@ -31,6 +31,7 @@
     "vitest": "~4.1.12"
   },
   "overrides": {
-    "vitest": "~4.1.12"
+    "vitest": "~4.1.12",
+    "uuid@<12.0.0": "^11.1.1"
   }
 }
@@ -164,6 +164,20 @@ export const POLICY_STAMPS = [
     // direct `devDependencies.vitest` (`EOVERRIDE`), so the two rows above and
     // here must move together, and only generation makes them.
   },
+  {
+    key: 'overrides.uuid@<12.0.0',
+    block: 'overrides',
+    field: 'uuid@<12.0.0',
+    constant: 'SCAFFOLD_UUID_OVERRIDE_RANGE',
+    // The npm override that routes exceljs's `uuid ^8.3.0` (through
+    // `@objectstack/rest`) out of GHSA-w5hq-g745-h8pq. The field is
+    // `SCAFFOLD_UUID_OVERRIDE_SELECTOR`, spelled here as the key the template
+    // declares; `os init` / `os create` emit it from that constant. This
+    // script's `--check` compares VALUES only, so the key spellings are held
+    // equal by `packages/cli/test/scaffold-emission-policy.e2e.test.ts`
+    // (nightly tier), which compares the on-ramp's whole `overrides` block
+    // with theirs.
+  },
 ];
 
 /**
@@ -332,7 +346,9 @@ export function stampPolicy(text, policy, { label = TEMPLATE_PKG_FILE } = {}) {
     }
     const span = findBlockSpan(out, stamp.block, label);
     const block = out.slice(span.start, span.end);
-    const field = new RegExp(`("${stamp.field}"\\s*:\\s*)"([^"]*)"`, 'g');
+    // Escaped: an npm override selector (`uuid@<12.0.0`) carries `.`, which
+    // unescaped would match any character.
+    const field = new RegExp(`("${escapeRe(stamp.field)}"\\s*:\\s*)"([^"]*)"`, 'g');
     const hits = [...block.matchAll(field)];
     if (hits.length !== 1) {
       throw new Error(
@@ -630,8 +646,14 @@ const SELF_TEST_POLICY = {
   SCAFFOLD_PNPM_RANGE: '>=99.1',
   SCAFFOLD_TYPESCRIPT_RANGE: '^9.9.9',
   SCAFFOLD_VITEST_RANGE: '~8.8.0',
+  SCAFFOLD_UUID_OVERRIDE_RANGE: '^7.7.7',
+};
+const STALE = {
+  SCAFFOLD_PNPM_RANGE: '>=1.0',
+  SCAFFOLD_TYPESCRIPT_RANGE: '^1.0.0',
+  SCAFFOLD_VITEST_RANGE: '^1.1.0',
+  SCAFFOLD_UUID_OVERRIDE_RANGE: '^1.2.3',
 };
-const STALE = { SCAFFOLD_PNPM_RANGE: '>=1.0', SCAFFOLD_TYPESCRIPT_RANGE: '^1.0.0', SCAFFOLD_VITEST_RANGE: '^1.1.0' };
 
 function policySource(policy = SELF_TEST_POLICY) {
   return [
@@ -642,6 +664,8 @@ function policySource(policy = SELF_TEST_POLICY) {
     '',
     `export const SCAFFOLD_VITEST_RANGE = '${policy.SCAFFOLD_VITEST_RANGE}';`,
     '',
+    `export const SCAFFOLD_UUID_OVERRIDE_RANGE = '${policy.SCAFFOLD_UUID_OVERRIDE_RANGE}';`,
+    '',
   ].join('\n');
 }
 
@@ -661,7 +685,10 @@ function templatePkg(policy, { overrideVitest } = {}) {
         typescript: policy.SCAFFOLD_TYPESCRIPT_RANGE,
         vitest: policy.SCAFFOLD_VITEST_RANGE,
       },
-      overrides: { vitest: overrideVitest ?? policy.SCAFFOLD_VITEST_RANGE },
+      overrides: {
+        vitest: overrideVitest ?? policy.SCAFFOLD_VITEST_RANGE,
+        'uuid@<12.0.0': policy.SCAFFOLD_UUID_OVERRIDE_RANGE,
+      },
     },
     null,
     2,
@@ -813,6 +840,12 @@ function selfTest() {
         }),
         'BOTH vitest stamps — devDependencies.vitest and overrides.vitest — now read the policy',
       );
+      // The selector key carries `@`, `<` and `.`: the rewrite must land on it
+      // exactly, never on a span a looser pattern happened to match.
+      ok(
+        after.every((t) => JSON.parse(t).overrides['uuid@<12.0.0'] === '^7.7.7'),
+        'the uuid override, keyed by its npm selector `uuid@<12.0.0`, now reads the policy',
+      );
       ok(runFixture(script, ['--check']).status === 0, '--check is green after the rewrite (idempotent)');
     },
     { templatePolicy: STALE },
Original file line number	Diff line number	Diff line change
`@@ -31,6 +31,7 @@`
`31`	`31`	`"vitest": "~4.1.12"`
`32`	`32`	`},`
`33`	`33`	`"overrides": {`
`34`		`- "vitest": "~4.1.12"`
	`34`	`+ "vitest": "~4.1.12",`
	`35`	`+ "uuid@<12.0.0": "^11.1.1"`
`35`	`36`	`}`
`36`	`37`	`}`