What’s Vulnerable › Vulnerabilities

CVE-2021-29261

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-05 · updated 2026-06-17

Description

The unofficial Svelte extension before 104.8.0 for Visual Studio Code allows attackers to execute arbitrary code via a crafted workspace configuration.

Affected products

• sveltejs svelte: before 104.8.0 — fixed in 104.8.0

How to fix

Upgrade to a fixed version: sveltejs svelte 104.8.0. Check the vendor advisory for mitigations.

References

• https://github.com/sveltejs/language-tools/commit/5d7bf1fd98bfe2cd2080863a3c95ce099b898075
• https://github.com/sveltejs/language-tools/releases
• https://github.com/sveltejs/language-tools/releases/tag/extensions-104.8.0
• https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode
• https://vuln.ryotak.me/advisories/3
• https://github.com/sveltejs/language-tools/commit/5d7bf1fd98bfe2cd2080863a3c95ce099b898075
• https://github.com/sveltejs/language-tools/releases
• https://github.com/sveltejs/language-tools/releases/tag/extensions-104.8.0
• https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode
• https://vuln.ryotak.me/advisories/3

Get alerted when CVE-2021-29261 or the next vulnerability affects your stack