sveltejs svelte up to 5.55.6 cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k1.37

Summaryinfo

A vulnerability classified as problematic was found in sveltejs svelte up to 5.55.6. This affects an unknown part. Such manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-42573. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in sveltejs svelte up to 5.55.6. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-42573 since 04/28/2026. The exploitation is known to be difficult. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 5.55.7 eliminates this vulnerability. The upgrade is hosted for download at github.com.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: svelte 5.55.7

Timelineinfo

04/28/2026 CVE reserved
06/09/2026 +42 days Advisory disclosed
06/09/2026 +0 days VulDB entry created
06/13/2026 +4 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-rcqx-6q8c-2c42
Status: Confirmed

CVE: CVE-2026-42573 (🔒)
GCVE (CVE): GCVE-0-2026-42573
GCVE (VulDB): GCVE-100-369866

Entryinfo

Created: 06/09/2026 21:19
Updated: 06/13/2026 22:50
Changes: 06/09/2026 21:19 (68), 06/13/2026 22:50 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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