Fixed an uninitialized memory disclosure issue in websocket.close()
(c0327ec1).
Providing a TypedArray (e.g. Float32Array) as the reason argument for
websocket.close(), rather than the supported string or Buffer types, caused
uninitialized memory to be disclosed to the remote peer.
import { deepStrictEqual } from 'node:assert';
import { WebSocket, WebSocketServer } from 'ws';
const wss = new WebSocketServer(
{ port: 0, skipUTF8Validation: true },
function () {
const { port } = wss.address();
const ws = new WebSocket(ws://localhost:${port}, {
skipUTF8Validation: true
});
ws.on('close', function (code, reason) {
deepStrictEqual(reason, Buffer.alloc(80));
});
}
);
wss.on('connection', function (ws) {
ws.close(1000, new Float32Array(20));
});
Wrangler now detects AI coding agents and offers to install Cloudflare skill files from the cloudflare/skills GitHub repository. Users are prompted once interactively; subsequent runs skip the prompt. Use --install-skills to install without prompting.
#13989f598eac Thanks @MattieTK! - Print a QR code alongside the tunnel URL when sharing via Cloudflare Tunnel
When a tunnel is started (via wrangler dev --tunnel or the Vite plugin with tunnel: true), a scannable QR code is now printed to the terminal beneath the tunnel URL. This makes it easy to open the tunnel on a mobile device without manually copying the URL.
The QR code uses Unicode block characters for a compact representation and is generated best-effort -- if generation fails for any reason, the tunnel URL is still displayed as before.
#134673a1fbed Thanks @deloreyj! - Add schedule property to Workflow bindings for cron-based triggering
Note: This is a configuration-only change. Scheduled triggering of Workflow instances is not yet available — adding schedule to a Workflow binding will not result in scheduled invocations at this time. This change lays the groundwork for an upcoming feature.
Workflow bindings in wrangler.json now accept an optional schedule field that configures one or more cron expressions to automatically trigger new workflow instances on a schedule.
The schedule is sent to the Workflows control plane on wrangler deploy. Configuring schedule on a workflow binding that references an external script_name is an error — the schedule must be configured on the worker that defines the workflow.
Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.
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🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.
## 📋 Pull Request Information
**Original PR:** https://github.com/harvard-edge/cs249r_book/pull/1809
**Author:** [@dependabot[bot]](https://github.com/apps/dependabot)
**Created:** 5/27/2026
**Status:** ✅ Merged
**Merged:** 5/27/2026
**Merged by:** [@profvjreddi](https://github.com/profvjreddi)
**Base:** `dev` ← **Head:** `dependabot/npm_and_yarn/interviews/staffml-vault-worker/multi-c07a5c2b57`
---
### 📝 Commits (1)
- [`0991605`](https://github.com/harvard-edge/cs249r_book/commit/0991605f940cea29d351f85a0ab3093ef7c4533d) chore(deps): bump ws and wrangler in /interviews/staffml-vault-worker
### 📊 Changes
**2 files changed** (+106 additions, -45 deletions)
<details>
<summary>View changed files</summary>
📝 `interviews/staffml-vault-worker/package-lock.json` (+105 -44)
📝 `interviews/staffml-vault-worker/package.json` (+1 -1)
</details>
### 📄 Description
Bumps [ws](https://github.com/websockets/ws) to 8.20.1 and updates ancestor dependency [wrangler](https://github.com/cloudflare/workers-sdk/tree/HEAD/packages/wrangler). These dependencies need to be updated together.
Updates `ws` from 8.18.0 to 8.20.1
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/websockets/ws/releases">ws's releases</a>.</em></p>
<blockquote>
<h2>8.20.1</h2>
<h1>Bug fixes</h1>
<ul>
<li>Fixed an uninitialized memory disclosure issue in <code>websocket.close()</code>
(c0327ec1).</li>
</ul>
<p>Providing a <code>TypedArray</code> (e.g. <code>Float32Array</code>) as the <code>reason</code> argument for
<code>websocket.close()</code>, rather than the supported string or <code>Buffer</code> types, caused
uninitialized memory to be disclosed to the remote peer.</p>
<pre lang="js"><code>import { deepStrictEqual } from 'node:assert';
import { WebSocket, WebSocketServer } from 'ws';
<p>const wss = new WebSocketServer(
{ port: 0, skipUTF8Validation: true },
function () {
const { port } = wss.address();
const ws = new WebSocket(<code>ws://localhost:${port}</code>, {
skipUTF8Validation: true
});</p>
<pre><code>ws.on('close', function (code, reason) {
deepStrictEqual(reason, Buffer.alloc(80));
});
</code></pre>
<p>}
);</p>
<p>wss.on('connection', function (ws) {
ws.close(1000, new Float32Array(20));
});
</code></pre></p>
<p>The issue was privately reported by <a href="https://github.com/ChALkeR">Nikita Skovoroda</a>.</p>
<h2>8.20.0</h2>
<h1>Features</h1>
<ul>
<li>Added exports for the <code>PerMessageDeflate</code> class and utilities for the
<code>Sec-WebSocket-Extensions</code> and <code>Sec-WebSocket-Protocol</code> headers (d3503c1f).</li>
</ul>
<h2>8.19.0</h2>
<h1>Features</h1>
<ul>
<li>Added the <code>closeTimeout</code> option (<a href="https://redirect.github.com/websockets/ws/issues/2308">#2308</a>).</li>
</ul>
<h1>Bug fixes</h1>
<ul>
<li>Handled a forthcoming breaking change in Node.js core (19984854).</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/websockets/ws/commit/5d9b316230ea931532a6671cc450f18c11edd02f"><code>5d9b316</code></a> [dist] 8.20.1</li>
<li><a href="https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086"><code>c0327ec</code></a> [security] Fix uninitialized memory disclosure in <code>websocket.close()</code></li>
<li><a href="https://github.com/websockets/ws/commit/ce2a3d62437995a47e6056d485a33d21b6a8f867"><code>ce2a3d6</code></a> [ci] Test on node 26</li>
<li><a href="https://github.com/websockets/ws/commit/58e45b872bb0f35a3edd553c27e105300a4f5bd0"><code>58e45b8</code></a> [ci] Do not test on node 25</li>
<li><a href="https://github.com/websockets/ws/commit/5f26c245231a4b018479a9269e8c3da4773fe42f"><code>5f26c24</code></a> [ci] Run the lint step on node 24</li>
<li><a href="https://github.com/websockets/ws/commit/843925544e2f4cffe445e0179947f56d6c5b608f"><code>8439255</code></a> [dist] 8.20.0</li>
<li><a href="https://github.com/websockets/ws/commit/d3503c1fd36a310985108f62b343bae18346ab67"><code>d3503c1</code></a> [minor] Export the <code>PerMessageDeflate</code> class and header utils</li>
<li><a href="https://github.com/websockets/ws/commit/3ee5349a0b1580f6e1f347b59ec3371011bd8481"><code>3ee5349</code></a> [api] Convert the <code>isServer</code> and <code>maxPayload</code> parameters to options</li>
<li><a href="https://github.com/websockets/ws/commit/91707b470ebd803aaa3fd1e896217740f39267d4"><code>91707b4</code></a> [doc] Add missing space</li>
<li><a href="https://github.com/websockets/ws/commit/8b553192268810a83253e2a4a39ac16768e75bb3"><code>8b55319</code></a> [pkg] Update eslint to version 10.0.1</li>
<li>Additional commits viewable in <a href="https://github.com/websockets/ws/compare/8.18.0...8.20.1">compare view</a></li>
</ul>
</details>
<br />
Updates `wrangler` from 4.92.0 to 4.95.0
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/cloudflare/workers-sdk/releases">wrangler's releases</a>.</em></p>
<blockquote>
<h2>wrangler@4.94.0</h2>
<h3>Minor Changes</h3>
<ul>
<li>
<p><a href="https://redirect.github.com/cloudflare/workers-sdk/pull/13897">#13897</a> <a href="https://github.com/cloudflare/workers-sdk/commit/52e9082e32d7bffaeca92f27ab472b56964ba2bb"><code>52e9082</code></a> Thanks <a href="https://github.com/dario-piotrowicz"><code>@dario-piotrowicz</code></a>! - Add automatic Cloudflare skills installation for AI coding agents</p>
<p>Wrangler now detects AI coding agents and offers to install Cloudflare skill files from the <code>cloudflare/skills</code> GitHub repository. Users are prompted once interactively; subsequent runs skip the prompt. Use <code>--install-skills</code> to install without prompting.</p>
</li>
<li>
<p><a href="https://redirect.github.com/cloudflare/workers-sdk/pull/13989">#13989</a> <a href="https://github.com/cloudflare/workers-sdk/commit/f598eac72bcdf838ba890bcbd100e99ee8fac17f"><code>f598eac</code></a> Thanks <a href="https://github.com/MattieTK"><code>@MattieTK</code></a>! - Print a QR code alongside the tunnel URL when sharing via Cloudflare Tunnel</p>
<p>When a tunnel is started (via <code>wrangler dev --tunnel</code> or the Vite plugin with <code>tunnel: true</code>), a scannable QR code is now printed to the terminal beneath the tunnel URL. This makes it easy to open the tunnel on a mobile device without manually copying the URL.</p>
<p>The QR code uses Unicode block characters for a compact representation and is generated best-effort -- if generation fails for any reason, the tunnel URL is still displayed as before.</p>
</li>
<li>
<p><a href="https://redirect.github.com/cloudflare/workers-sdk/pull/13467">#13467</a> <a href="https://github.com/cloudflare/workers-sdk/commit/3a1fbed5988efe03ae50cc502eff6a4785728396"><code>3a1fbed</code></a> Thanks <a href="https://github.com/deloreyj"><code>@deloreyj</code></a>! - Add <code>schedule</code> property to Workflow bindings for cron-based triggering</p>
<blockquote>
<p><strong>Note:</strong> This is a configuration-only change. Scheduled triggering of Workflow instances is not yet available — adding <code>schedule</code> to a Workflow binding will not result in scheduled invocations at this time. This change lays the groundwork for an upcoming feature.</p>
</blockquote>
<p>Workflow bindings in <code>wrangler.json</code> now accept an optional <code>schedule</code> field that configures one or more cron expressions to automatically trigger new workflow instances on a schedule.</p>
<pre lang="jsonc"><code>// wrangler.json
{
"workflows": [
{
"binding": "MY_WORKFLOW",
"name": "my-workflow",
"class_name": "MyWorkflow",
"schedule": "0 9 * * 1"
}
]
}
</code></pre>
<p>Multiple schedules can be provided as an array:</p>
<pre lang="jsonc"><code>{
"workflows": [
{
"binding": "MY_WORKFLOW",
"name": "my-workflow",
"class_name": "MyWorkflow",
"schedule": ["0 9 * * 1", "0 17 * * 5"]
}
]
}
</code></pre>
<p>The schedule is sent to the Workflows control plane on <code>wrangler deploy</code>. Configuring <code>schedule</code> on a workflow binding that references an external <code>script_name</code> is an error — the schedule must be configured on the worker that defines the workflow.</p>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/cloudflare/workers-sdk/commits/HEAD/packages/wrangler">compare view</a></li>
</ul>
</details>
<br />
Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.
[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)
---
<details>
<summary>Dependabot commands and options</summary>
<br />
You can trigger Dependabot actions by commenting on this PR:
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You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/harvard-edge/cs249r_book/network/alerts).
</details>
---
<sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
Blocking a user prevents them from interacting with repositories, such as opening or commenting on pull requests or issues. Learn more about blocking a user.
📋 Pull Request Information
Original PR: https://github.com/harvard-edge/cs249r_book/pull/1809
Author: @dependabot[bot]
Created: 5/27/2026
Status: ✅ Merged
Merged: 5/27/2026
Merged by: @profvjreddi
Base:
dev← Head:dependabot/npm_and_yarn/interviews/staffml-vault-worker/multi-c07a5c2b57📝 Commits (1)
0991605chore(deps): bump ws and wrangler in /interviews/staffml-vault-worker📊 Changes
2 files changed (+106 additions, -45 deletions)
View changed files
📝
interviews/staffml-vault-worker/package-lock.json(+105 -44)📝
interviews/staffml-vault-worker/package.json(+1 -1)📄 Description
Bumps ws to 8.20.1 and updates ancestor dependency wrangler. These dependencies need to be updated together.
Updates
wsfrom 8.18.0 to 8.20.1Release notes
Sourced from ws's releases.
... (truncated)
Commits
5d9b316[dist] 8.20.1c0327ec[security] Fix uninitialized memory disclosure inwebsocket.close()ce2a3d6[ci] Test on node 2658e45b8[ci] Do not test on node 255f26c24[ci] Run the lint step on node 248439255[dist] 8.20.0d3503c1[minor] Export thePerMessageDeflateclass and header utils3ee5349[api] Convert theisServerandmaxPayloadparameters to options91707b4[doc] Add missing space8b55319[pkg] Update eslint to version 10.0.1Updates
wranglerfrom 4.92.0 to 4.95.0Release notes
Sourced from wrangler's releases.
... (truncated)
Commits
Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR:
@dependabot rebasewill rebase this PR@dependabot recreatewill recreate this PR, overwriting any edits that have been made to it@dependabot show <dependency name> ignore conditionswill show all of the ignore conditions of the specified dependency@dependabot ignore this major versionwill close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)@dependabot ignore this minor versionwill close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)@dependabot ignore this dependencywill close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)You can disable automated security fix PRs for this repo from the Security Alerts page.
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.