How many CVEs does Svelte have?

Svelte has 26 published CVE records since 2021, including 18 in the last two years.

How many Svelte CVEs are in CISA KEV?

None of Svelte's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.

Which Svelte products have the most CVEs?

The Svelte products with the most published CVEs are Svelte, kit, devalue, sveltekit, adapter-node.

What are the most common weakness types in Svelte CVEs?

Svelte's CVEs most often map to these CWE weakness types: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')), CWE-405 (Asymmetric Resource Consumption (Amplification)), CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-918 (Server-Side Request Forgery (SSRF)).

Are there public exploits for Svelte vulnerabilities?

Yes — 5 of Svelte's CVEs have a known public exploit.

What is the average severity of Svelte CVEs?

The average CVSS base score across Svelte's scored CVEs is 6.2.

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26 CVEs

Svelte Vulnerabilities

Name: Svelte vulnerability dataset (CVEs)
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

CVE security advisories and vulnerability history for Svelte.

26

Total CVEs

Published

0

In CISA KEV

Exploited in the wild

5

Public exploits

PoC or exploit code

6.2

Avg CVSS

2021–2026

Overview

Svelte has 26 published CVE records since 2021, of which 0 are in CISA's Known Exploited Vulnerabilities catalog and 5 have a known public exploit. The average CVSS base score across scored CVEs is 6.2.

This page aggregates every publicly disclosed vulnerability (CVE) affecting Svelte products, with severity breakdowns, the most-affected products, the most common weakness types, and the latest disclosures.

Security scorecard

A quick read on Svelte's vulnerability posture, as a share of its 26 published CVEs.

Average CVSS: 6.2
Critical / high: 38%
Actively exploited (KEV): 0%
Public exploit available: 19%
Patch available: 100%

Severity and exploitation

How the CVSS severity of Svelte's CVEs breaks down, plus how many are exploited in the wild or have public exploit code.

Critical0

High10

Medium14

Low2

In CISA’s Known Exploited Vulnerabilities catalog

0

None of Svelte's CVEs are currently listed in CISA's KEV catalog.

Public exploits

5

5 of Svelte's CVEs have a known public exploit available.

Most affected products

The Svelte products with the most published CVEs. Follow any product to browse its versions and vulnerabilities.

Common weakness types

The CWE weakness categories most often found in Svelte CVEs. Follow any weakness for its full explanation.

CNAs that assign these CVEs

The CVE Numbering Authorities that publish Svelte CVE records.

Disclosure activity by year

How many Svelte CVEs were published each year.

2021

1

2022

1

2023

2

2024

4

2026

18

Latest Svelte CVEs

The most recently disclosed vulnerabilities affecting Svelte.

Cross-site scripting via spread attributes in Svelte SSR
CWE-79
Medium · CVSS 5.1
EPSS 0.2%2026-06-09
Svelte: ReDoS in ` ` Tag Validation
CWE-1333
Medium · CVSS 5.9
EPSS 0.4%2026-06-09
Svelte: XSS via DOM Clobbering of Internal Framework State
CWE-79
Medium · CVSS 5.3
EPSS 0.3%2026-06-09
Svelte devalue: DoS via sparse array deserialization
CWE-770
High · CVSS 7.5
EPSS 0.4%2026-06-09
SvelteKit's invalidated redirect in handle hook causes Denial-of-Service
CWE-755
Medium · CVSS 6.3
EPSS 0.4%2026-04-10
SvelteKit has a BODY_SIZE_LIMIT bypass in @sveltejs/adapter-node
CWE-770
High · CVSS 8.2
EPSS 0.5%2026-04-10
devalue has prototype pollution in devalue.parse and devalue.unflatten
CWE-1321
Medium · CVSS 6.3
EPSS 0.4%2026-03-11
Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers
CWE-79
Medium · CVSS 5.3
EPSS 0.2%2026-02-26
Svelte vulnerable to XSS during SSR with contenteditable `bind:innerText` and `bind:textContent`
CWE-79
Medium · CVSS 5.3
EPSS 0.2%2026-02-26
Svelte SSR attribute spreading includes inherited properties from prototype chain
CWE-915
Medium · CVSS 5.3
EPSS 0.4%2026-02-20
Svelte SSR does not validate dynamic element tag names in ` `
CWE-79
Medium · CVSS 5.1
EPSS 0.2%2026-02-20
Svelte affected by cross-site scripting via spread attributes in Svelte SSR
CWE-79
Medium · CVSS 5.1
EPSS 0.2%2026-02-20

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Frequently asked questions

Common questions about Svelte vulnerabilities.

How many CVEs does Svelte have?: Svelte has 26 published CVE records since 2021, including 18 in the last two years.
How many Svelte CVEs are in CISA KEV?: None of Svelte's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.
Which Svelte products have the most CVEs?: The Svelte products with the most published CVEs are Svelte, kit, devalue, sveltekit, adapter-node.
What are the most common weakness types in Svelte CVEs?: Svelte's CVEs most often map to these CWE weakness types: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')), CWE-405 (Asymmetric Resource Consumption (Amplification)), CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-918 (Server-Side Request Forgery (SSRF)).
Are there public exploits for Svelte vulnerabilities?: Yes — 5 of Svelte's CVEs have a known public exploit.
What is the average severity of Svelte CVEs?: The average CVSS base score across Svelte's scored CVEs is 6.2.

References

Vulnerability data is sourced from the CVE Program; severity, KEV, and exploit signals are aggregated by RadicalNotion.AI.

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