# @builder.io/qwik (npm) vulnerabilities

5 known vulnerabilities (2 critical, 1 high, 2 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 1.20.3 (Oct 25, 2026): no advisory affects it
- Newest unaffected release: 1.20.3 (Oct 25, 2026), the latest release
- Weekly downloads: 63.3K
- Dependents: 30
- Releases: 341 since 0.0.6 (Jun 1, 2021)
- Registry: https://www.npmjs.com/package/@builder.io/qwik
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-84994: 0.0.1-mono to 1.19.2 (1.20.0 is outside it)
- CVE-2026-27971: 0.0.1-mono to 1.19.0 (1.19.1 is outside it)
- CVE-2024-41677: 0.0.1-mono to 1.7.2 (1.7.3 is outside it)
- CVE-2023-1283: 0.0.1-mono to 0.20.1 (0.21.0 is outside it)
- CVE-2023-0410: 0.0.1-mono to 0.16.1 (0.16.2 is outside it)

## Advisories (5)

### [CVE-2026-84994](https://cve.now/CVE-2026-84994): Qwik: Crashing any Qwik Server via Resource thenable

- Severity: High 8.7
- Published: Oct 13, 2026
- Affected: fixed in 1.20.0.
- Fixed in 1.20.0 (released May 22, 2026, 144 days before disclosure).
- The latest release, 1.20.3, is not affected.
- 42% of @builder.io/qwik downloads last week were affected versions (25.5K).

### [CVE-2026-27971](https://cve.now/CVE-2026-27971): Qwik affected by unauthenticated RCE via server$ Deserialization

- Severity: Critical 9.2
- Published: Mar 3, 2026
- Affected: fixed in 1.19.1.
- Fixed in 1.19.1 (released Mar 2, 2026, 1 day before disclosure).
- The latest release, 1.20.3, is not affected.
- 38% of @builder.io/qwik downloads last week were affected versions (22.7K).

### [CVE-2024-41677](https://cve.now/CVE-2024-41677): Cross-site Scripting (XSS) vulnerability due to improper HTML escaping in qwik

- Severity: Medium 6.3
- Published: Aug 6, 2024
- Affected: fixed in 1.7.3.
- Fixed in 1.7.3 (released Jul 29, 2024, 8 days before disclosure).
- The latest release, 1.20.3, is not affected.
- 14% of @builder.io/qwik downloads last week were affected versions (8.3K).

### [CVE-2023-1283](https://cve.now/CVE-2023-1283): Code Injection in builderio/qwik

- Severity: Critical 10.0
- Published: Mar 8, 2023
- Affected: fixed in 0.21.0.
- Fixed in 0.21.0 (released Mar 7, 2023, 1 day before disclosure).
- The latest release, 1.20.3, is not affected.
- 2.9% of @builder.io/qwik downloads last week were affected versions (1.8K).

### [CVE-2023-0410](https://cve.now/CVE-2023-0410): Cross-site Scripting (XSS) - Generic in builderio/qwik

- Severity: Medium 6.1
- Published: Jan 20, 2023
- Affected: fixed in 0.16.2.
- Fixed in 0.16.2 (released Jan 4, 2023, 16 days before disclosure).
- The latest release, 1.20.3, is not affected.
- 1.8% of @builder.io/qwik downloads last week were affected versions (1.1K).

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