Medium severity · published Feb 26, 2026
CVE-2026-27901
Svelte vulnerable to XSS during SSR with contenteditable `bind:innerText` and `bind:textContent`
6.1
CVSS
0.3%
EPSS
No
On KEV
Description
Svelte performance oriented web framework. Prior to version 5.53.5, the contents of `bind:innerText` and `bind:textContent` on `contenteditable` elements were not properly escaped. This could enable HTML injection and Cross-Site Scripting (XSS) if rendering untrusted data as the binding's initial value on the server. Version 5.53.5 fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SV
svelte · sveltejs
< 5.53.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27901
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27901
Patch
https://github.com/sveltejs/svelte/commit/0df5abcae223058ceb95491470372065fb87951d
Release Notes
https://github.com/sveltejs/svelte/releases/tag/svelte%405.53.5
Vendor Advisory
https://github.com/sveltejs/svelte/security/advisories/GHSA-phwv-c562-gvmh
More from svelte
7.5
CVE-2026-42567
Svelte: ReDoS in `<svelte:element>` Tag Validation
6.8
CVE-2026-27125
Svelte SSR attribute spreading includes inherited properties from prototype chain
6.1
CVE-2026-42599
Cross-site scripting via spread attributes in Svelte SSR
6.1
CVE-2026-42573
Svelte: XSS via DOM Clobbering of Internal Framework State
5.4
CVE-2026-27902
Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers