TI-2026-85245 Aliases CVE-2026-76826

Command injection in tsParticles stable publish workflow via release notes

HIGH 68CWE-78Published 2026-11-04 · Updated 2026-11-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

tsParticles versions from 4.0.0 before 4.3.2 are affected. The stable publish workflow inserts the generated release notes body directly into a Bash echo command, so shell metacharacters in that text are interpreted by the shell (CWE-78). An attacker who can influence the generated release-note text can run commands when a maintainer starts a stable release, which can modify generated artifacts or workspace scripts and affect later release steps that hold GITHUB_TOKEN and write permissions. The CVSS 4.0 vector requires user interaction and gives high impact to confidentiality, integrity and availability of the vulnerable system.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

tsParticles is a TypeScript library for creating highly customizable particle animations. From 4.0.0 until 4.3.2, the stable publish workflow interpolates steps.release.outputs.body directly into an echo command in Bash source before writing RAW_RELEASE.md. Contributor-controlled shell metacharacters in generated release-note text can therefore execute when a maintainer starts a stable release, allowing modification of generated artifacts or workspace scripts and affecting later release steps that hold GITHUB_TOKEN and write permissions. This issue is fixed in version 4.3.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00305 23rd percentileScored 2026-11-07

Fix Fixed tsparticles (tsparticles): 4.3.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
tsparticles	tsparticles	4.0.0 to before 4.3.2	4.3.2	Patch available	CNA

tsparticles Vendortsparticles Affected 4.0.0 to before 4.3.2 Fixed in 4.3.2 Patch available CNA

Remediation

Upgrade tsparticles to version 4.3.2, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fix · CNA tsparticles (tsparticles) Fixed in 4.3.2

Timeline

2026-11-04 Threatist record created from CVE-2026-76826
2026-11-05 CISA SSVC decision points changed
2026-11-05 Priority changed: MEDIUM → HIGH

References

Other 3

TI-2026-85246 Malformed JSON requests crash the tsParticles MCP server HTTP process CVSS 4.0HIGH 8.7
TI-2026-85240 Unbounded request body buffering in tsParticles MCP server CVSS 3.1HIGH 7.5
TI-2026-85241 tsParticles MCP server lets one anonymous session block new clients CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences