CVE-2024-23641Public exploitNetwork attack vector

Service crash via unsupported HTTP request bodies

Published Jan 24, 2024 · Updated Nov 13, 2024

Denial of service in SvelteKit 2.0.0 through 2.4.2 allows remote attackers to crash Node-hosted apps with crafted HTTP requests. The Node request bridge passes bodies from every HTTP method into the Fetch Request constructor, which throws on GET or HEAD bodies and leaves TRACE errors uncaught. Only preview or adapter-node deployments with non-prerendered routes are exposed; one request terminates the process and requires a restart.

CVSS severity7.5
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in SvelteKit 2.0.0 through 2.4.2 allows remote attackers to crash Node-hosted apps with crafted HTTP requests. The Node request bridge passes bodies from every HTTP method into the Fetch Request constructor, which throws on GET or HEAD bodies and leaves TRACE errors uncaught. Only preview or adapter-node deployments with non-prerendered routes are exposed; one request terminates the process and requires a restart.

The record

CVE
CVE-2024-23641
Published
Jan 24, 2024
Updated
Nov 13, 2024
Vendor
Svelte
Product
SvelteKit
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 13, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0.0, < 2.1.2
  2. Affected versionversion=>= 2.0.0, < 2.4.3
  3. Affected versionversion=>= 3.0.0, < 3.0.3
  4. Affected versionversion== 4.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Svelte · SvelteKitversion=>= 2.0.0, < 2.1.2; version=>= 2.0.0, < 2.4.3; version=>= 3.0.0, < 3.0.3; version== 4.0.0

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo