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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-42573

25
FAUCET Score

Svelte is a performance oriented web framework. Prior to version 5.55.7, Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. This issue has been patched in version 5.55.7.

First published: Jun 9, 2026Last modified: Jun 9, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 5.55.7CPE matchmatch criteria
cpe:2.3:a:svelte:svelte:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 4.0

5.3MEDIUM

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
HIGH
SS Integrity
HIGH
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.32%
Probability of exploitation in next 30 days
EPSS Percentile
24.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0032 is in the 24th percentile among its peer group of 26,220 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

npmpatch availablevia ghsa
Product: svelteFixed in: 5.55.7
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

npmGHSA-rcqx-6q8c-2c42medium

Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State

May 14, 2026

References

access.redhat.com / security/cve/CVE-2026-42573
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-42573.json
github.com / sveltejs/svelte/releases/tag/svelte%405.55.7
ProductRelease Notes
github.com / sveltejs/svelte/security/advisories/GHSA-rcqx-6q8c-2c42
Vendor Advisory