CVE-2026-76892 json
tsParticles: Malformed JSON requests can terminate the @tsparticles/mcp-server HTTP process
published 7d ago modified 2d ago also EUVD-2026-117159 , GHSA-4p8p-pjpq-2w7h
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
tsParticles is a TypeScript library for creating highly customizable particle animations. Prior to 4.3.1, the HTTP mode of @tsparticles/mcp-server calls JSON.parse outside a request-local error boundary in the POST /mcp handler in integrations/mcp-server/src/index.ts. A single unauthenticated malformed JSON body raises a SyntaxError that terminates the Node.js process, leaving the MCP service unavailable until an external supervisor restarts it. This issue is fixed in version 4.3.1.
Patch / fix
- npm @tsparticles/mcp-server 4.3.1
- github.com/tsparticles/tsparticles@25fb70e commit
- github.com/tsparticles/tsparticles#5875 pull request
Is CVE-2026-76892 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6d ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/tsparticles/tsparticles/security/advisories/GHSA-4p8p-pjpq-2w7h referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @tsparticles/mcp-server | <4.3.1 |
4.3.1 |
Affected products
- tsparticles tsparticles
- @tsparticles mcp-server
Classification
- Weakness
-
- CWE-248 Uncaught Exception
References
-
github.com
/tsparticles/tsparticles/pull/5875
web
-
github.com
/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b
web
-
github.com
/tsparticles/tsparticles/security/advisories/GHSA-4p8p-pjpq-2w7h
exploit, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-76892
advisory
-
github.com
/tsparticles/tsparticles
package
Sources
- CVE List CVE-2026-76892
- GitHub Advisory GHSA-4p8p-pjpq-2w7h
- NVD CVE-2026-76892
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.