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VulnerabilityPublished

CVE-2026-63655: tsparticles · Uncontrolled Resource Consumption

Affects tsparticlesSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 4.3.1 soon.

Data as of 5 Nov 2026, 00:16 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.17.5
Patch
Available – fixed in 4.3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade tsparticles and mcp-server to 4.3.1.

Affected software

ProductAffectedFixed in
tsparticlestsparticlesAffected
  • <4.3.1
Fixed in
  • 4.3.1
@tsparticlesmcp-serverAffected
  • <4.3.1
Fixed in
  • 4.3.1

AI-suggested

Upgrade tsparticles to version 4.3.1 or later, where this vulnerability is fixed. No other mitigation is required as the fix addresses the uncontrolled resource consumption issue.

Description

CVE-2026-63655 is a high-severity vulnerability in the tsparticles TypeScript library prior to version 4.3.1. The HTTP mode of @tsparticles/mcp-server accepts unauthenticated POST requests and accumulates request body chunks in memory without size limits, allowing remote attackers to exhaust Node.js process memory and cause service termination. This issue does not affect confidentiality or integrity. The vulnerability is fixed in version 4.3.1.

References

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