6.1

CVE-2026-27901: Svelte vulnerable to XSS during SSR with contenteditable `bind:innerText` and `bind:textContent`

Analyzed
AliasesCGA-4mfh-jmhc-87w7CGA-cj3x-36h7-285hGHSA-phwv-c562-gvmh
Published 26-02-2026Last modified 26-02-2026

Vulnerability summary

CVE-2026-27901 is a medium (CVSS 6.1) vulnerability in svelte. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
0.26%
0%100%
Low · -0.13 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-65PC-M6F3-5GX8

Timeline

  1. 26-02-2026
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

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 metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

Decrease -0.13 pp

From 0.39% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard5 products
  • langfuse-2-workerAll versions (No fix recorded)
  • langfuse-3-worker< 3.163.0-r0
  • langfuse-fips-2-workerAll versions (No fix recorded)
  • langfuse-fips-3-worker< 3.163.0-r0
  • langfuse-fips-3.152-workerAll versions (No fix recorded)
Npm1 product
  • svelte< 5.53.5
Svelte1 product
Sveltejs1 product
Wolfi1 product
  • langfuse-3-worker< 3.163.0-r0

5 vendors · 9 products

References

7 links