CVE-2021-29261
The unofficial Svelte extension before 104.8.0 for Visual Studio Code allows attackers to execute arbitrary code via a crafted workspace configuration.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The unofficial Svelte extension before 104.8.0 for Visual Studio Code allows attackers to execute arbitrary code via a crafted workspace configuration.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.37% probability · 72th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- svelte/svelte
- Source
- cve@mitre.org
EPSS 1.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/sveltejs/language-tools/commit/5d7bf1fd98bfe2cd2080863a3c95ce099b898075Patch, Third Party Advisory
- https://github.com/sveltejs/language-tools/releasesThird Party Advisory
- https://github.com/sveltejs/language-tools/releases/tag/extensions-104.8.0Release Notes, Third Party Advisory
- https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscodeProduct, Third Party Advisory
- https://vuln.ryotak.me/advisories/3Third Party Advisory
- https://github.com/sveltejs/language-tools/commit/5d7bf1fd98bfe2cd2080863a3c95ce099b898075Patch, Third Party Advisory
- https://github.com/sveltejs/language-tools/releasesThird Party Advisory
- https://github.com/sveltejs/language-tools/releases/tag/extensions-104.8.0Release Notes, Third Party Advisory
- https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscodeProduct, Third Party Advisory
- https://vuln.ryotak.me/advisories/3Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.