[Snyk] Upgrade typescript from 5.5.4 to 5.9.3

[snyk-io]

Snyk has created this PR to upgrade typescript from 5.5.4 to 5.9.3.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

---

• The recommended version is 431 versions ahead of your current version.

• The recommended version was released 7 months ago.

Issues fixed by the recommended upgrade:

	Issue	Score	Exploit Maturity
	Arbitrary Code Injection SNYK-JS-PROTOBUFJS-16094665	500	Proof of Concept
	Arbitrary Code Injection SNYK-JS-PROTOBUFJS-16094665	500	Proof of Concept

Breaking Change Risk

Notice: This assessment is enhanced by AI.

Release notes

Package name: typescript

• 5.9.3 - 2025-09-30
  

  Note: this tag was recreated to point at the correct commit. The npm package contained the correct content.

  For release notes, check out the release announcement

  • fixed issues query for Typescript 5.9.0 (Beta).
  • fixed issues query for Typescript 5.9.1 (RC).
  • No specific changes for TypeScript 5.9.2 (Stable)
  • fixed issues query for Typescript 5.9.3 (Stable).

  Downloads are available on:

  • npm
• 5.9.2 - 2025-07-31
  

  Note: this tag was recreated to point at the correct commit. The npm package contained the correct content.

  For release notes, check out the release announcement

  • fixed issues query for Typescript 5.9.0 (Beta).
  • fixed issues query for Typescript 5.9.1 (RC).
  • No specific changes for TypeScript 5.9.2 (Stable)

  Downloads are available on:

  • npm
• 5.9.1-rc - 2025-07-24
• 5.9.0-dev.20250731 - 2025-07-31
• 5.9.0-dev.20250730 - 2025-07-30
• 5.9.0-dev.20250729 - 2025-07-29
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• 5.9.0-dev.20250725 - 2025-07-25
• 5.9.0-dev.20250724 - 2025-07-24
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• 5.9.0-dev.20250220 - 2025-02-20
• 5.9.0-dev.20250219 - 2025-02-19
• 5.9.0-beta - 2025-07-08
• 5.8.3 - 2025-04-05
  

  Note: this tag was recreated to point at the correct commit. The npm package contained the correct content.

  For release notes, check out the release announcement.

  • fixed issues query for Typescript 5.8.0 (Beta).
  • fixed issues query for Typescript 5.8.1 (RC).
  • fixed issues query for Typescript 5.8.2 (Stable).
  • fixed issues query for Typescript 5.8.3 (Stable).

  Downloads are available on:

  • npm
• 5.8.2 - 2025-02-28
  

  For release notes, check out the release announcement.

  • fixed issues query for Typescript 5.8.0 (Beta).
  • fixed issues query for Typescript 5.8.1 (RC).
  • fixed issues query for Typescript 5.8.2 (Stable).

  Downloads are available on:

  • npm
• 5.8.1-rc - 2025-02-13
• 5.8.0-dev.20250218 - 2025-02-18
• 5.8.0-dev.20250217 - 2025-02-17
• 5.8.0-dev.20250216 - 2025-02-16
• 5.8.0-dev.20250215 - 2025-02-15
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• 5.8.0-beta - 2025-01-29
• 5.7.3 - 2025-01-08
• 5.7.2 - 2024-11-22
• 5.7.1-rc - 2024-11-08
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• 5.7.0-dev.20240822 - 2024-08-22
• 5.7.0-dev.20240821 - 2024-08-21
• 5.7.0-dev.20240820 - 2024-08-20
• 5.7.0-beta - 2024-10-09
• 5.6.3 - 2024-10-08
• 5.6.2 - 2024-09-09
• 5.6.1-rc - 2024-08-23
• 5.6.0-dev.20240819 - 2024-08-19
• 5.6.0-dev.20240818 - 2024-08-18
• 5.6.0-dev.20240817 - 2024-08-17
• 5.6.0-dev.20240816 - 2024-08-16
• 5.6.0-dev.20240815 - 2024-08-15
• 5.6.0-dev.20240814 - 2024-08-14
• 5.6.0-dev.20240813 - 2024-08-13
• 5.6.0-dev.20240812 - 2024-08-12
• 5.6.0-dev.20240811 - 2024-08-11
• 5.6.0-dev.20240810 - 2024-08-10
• 5.6.0-dev.20240809 - 2024-08-09
• 5.6.0-dev.20240808 - 2024-08-08
• 5.6.0-dev.20240807 - 2024-08-07
• 5.6.0-dev.20240806 - 2024-08-06
• 5.6.0-dev.20240805 - 2024-08-05
• 5.6.0-dev.20240804 - 2024-08-04
• 5.6.0-dev.20240803 - 2024-08-03
• 5.6.0-dev.20240802 - 2024-08-02
• 5.6.0-dev.20240801 - 2024-08-01
• 5.6.0-dev.20240731 - 2024-07-31
• 5.6.0-dev.20240730 - 2024-07-30
• 5.6.0-dev.20240729 - 2024-07-29
• 5.6.0-dev.20240728 - 2024-07-28
• 5.6.0-dev.20240727 - 2024-07-27
• 5.6.0-dev.20240726 - 2024-07-26
• 5.6.0-dev.20240725 - 2024-07-25
• 5.6.0-dev.20240724 - 2024-07-24
• 5.6.0-dev.20240723 - 2024-07-23
• 5.6.0-dev.20240722 - 2024-07-22
• 5.6.0-dev.20240721 - 2024-07-21
• 5.6.0-dev.20240720 - 2024-07-20
• 5.6.0-dev.20240719 - 2024-07-19
• 5.6.0-dev.20240718 - 2024-07-18
• 5.6.0-dev.20240717 - 2024-07-17
• 5.6.0-dev.20240716 - 2024-07-16
• 5.6.0-dev.20240715 - 2024-07-15
• 5.6.0-dev.20240714 - 2024-07-14
• 5.6.0-dev.20240713 - 2024-07-13
• 5.6.0-dev.20240712 - 2024-07-12
• 5.6.0-dev.20240711 - 2024-07-11
• 5.6.0-dev.20240710 - 2024-07-10
• 5.6.0-dev.20240709 - 2024-07-09
• 5.6.0-dev.20240708 - 2024-07-08
• 5.6.0-dev.20240707 - 2024-07-07
• 5.6.0-dev.20240706 - 2024-07-06
• 5.6.0-dev.20240705 - 2024-07-05
• 5.6.0-dev.20240704 - 2024-07-04
• 5.6.0-dev.20240703 - 2024-07-03
• 5.6.0-dev.20240702 - 2024-07-02
• 5.6.0-dev.20240701 - 2024-07-01
• 5.6.0-dev.20240630 - 2024-06-30
• 5.6.0-dev.20240629 - 2024-06-29
• 5.6.0-dev.20240628 - 2024-06-28
• 5.6.0-dev.20240627 - 2024-06-27
• 5.6.0-dev.20240626 - 2024-06-26
• 5.6.0-dev.20240625 - 2024-06-25
• 5.6.0-dev.20240624 - 2024-06-24
• 5.6.0-dev.20240623 - 2024-06-23
• 5.6.0-dev.20240622 - 2024-06-22
• 5.6.0-dev.20240621 - 2024-06-21
• 5.6.0-dev.20240620 - 2024-06-20
• 5.6.0-dev.20240619 - 2024-06-19
• 5.6.0-dev.20240618 - 2024-06-18
• 5.6.0-dev.20240617 - 2024-06-17
• 5.6.0-dev.20240616 - 2024-06-16
• 5.6.0-dev.20240615 - 2024-06-15
• 5.6.0-dev.20240614 - 2024-06-14
• 5.6.0-dev.20240613 - 2024-06-13
• 5.6.0-dev.20240612 - 2024-06-12
• 5.6.0-dev.20240611 - 2024-06-11
• 5.6.0-dev.20240610 - 2024-06-10
• 5.6.0-dev.20240609 - 2024-06-09
• 5.6.0-dev.20240608 - 2024-06-08
• 5.6.0-dev.20240607 - 2024-06-07
• 5.6.0-dev.20240606 - 2024-06-06
• 5.6.0-dev.20240605 - 2024-06-05
• 5.6.0-dev.20240604 - 2024-06-04
• 5.6.0-beta - 2024-07-26
• 5.5.4 - 2024-07-22

from typescript GitHub release notes

---

Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• This PR was automatically created by Snyk using the credentials of a real user.
• Max score is 1000. Note that the real score may have changed since the PR was raised.

---

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[snyk-io]

This upgrade to TypeScript introduces stricter type-checking rules and behavioral changes across versions 5.6, 5.7, 5.8, and 5.9 that may require code adjustments.

Key Changes:

• Stricter Checks: The compiler has been improved to catch more potential errors. This includes stricter checks for uninitialized variables, more accurate type inference for conditional return statements, and more precise error reporting for object literals.
• DOM & Lib Type Changes: Several built-in library types for the DOM and core JavaScript objects have been updated for better accuracy. For example, TypedArrays like Uint8Array are now generic, and some DOM method return types are more specific. These changes might require updating your code or dependencies like @types/node.

Potential Impact:
These changes are designed to improve type safety and catch bugs. However, they may cause your project to fail type-checking after the upgrade in places where the code was previously leniently typed.

Recommendation:
Review any new TypeScript errors after upgrading. It is likely that these errors point to legitimate, albeit subtle, bugs in the existing code. Pay close attention to code involving TypedArrays and direct DOM manipulation.

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.