[Security] [Dependabot] React Server Components have a Denial of Service Vulnerability

[care-taker-bot]

🟠 Severity: HIGH
Type: Dependabot security advisory
Package / Rule: react-server-dom-webpack
Alert: 187

Summary

Impact

A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack, react-server-dom-webpack versions 19.0.0, 19.1.0 and 19.2.0. The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.

The payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.

We recommend updating immediately.

The vulnerability exists in versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4 of:

react-server-dom-webpack
react-server-dom-parcel
react-server-dom-turbopack

Patches

Fixes were back ported to versions 19.0.5, 19.1.6, and 19.2.5.

If you are using any of the above packages please upgrade to any of the fixed versions immediately.

If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.

References

See the blog post for more information and upgrade instructions.

Remediation

Resolution steps for @copilot:

1. Review the alert at https://github.com/ianlintner/Example-React-AI-Chat-App/security/dependabot/187
2. If this is a dependency vulnerability: bump react-server-dom-webpack to a patched
   version; update lockfile.
3. If this is a code-scanning finding: fix the flagged code pattern.
4. If this is a secret exposure: rotate the credential immediately and
   remove it from git history.
5. Open a pull request with the fix and reference this issue.
6. Ensure CI passes before requesting review.

---

[care-taker-bot]

⚠️ Caretaker Escalation

Reason: Infrastructure/config issue — requires human access

This issue needs human attention.

Escalation debug dump

Generated at: 2026-06-11T18:22:50.909888+00:00

{
  "debug": {
    "classification": "INFRA_OR_CONFIG"
  },
  "issue": {
    "assignees": [],
    "html_url": "https://github.com/ianlintner/Example-React-AI-Chat-App/issues/681",
    "labels": [
      "maintainer:escalated",
      "security:finding"
    ],
    "number": 681,
    "state": "open",
    "title": "[Security] [Dependabot] React Server Components have a Denial of Service Vulnerability",
    "updated_at": "2026-06-11 17:58:30+00:00"
  },
  "owner": "ianlintner",
  "reason": "Infrastructure/config issue \u2014 requires human access",
  "repo": "Example-React-AI-Chat-App",
  "type": "issue_escalation"
}