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Microsoft Security Response CenterCVE-2026-18149

undici vulnerable to Denial of Service via orphaned RetryHandler response body

MediumVendor CVSS 5.9 / 10 1 CVE Published Sep 9, 2026 at 1:03 AM UTC

Summary

Mariner

Products covered

  • azl3 nodejs 24.18.1-1 on Azure Linux 3.0

  • azl3 nodejs 24.20.0-1 on Azure Linux 3.0

Remediation

See the Microsoft Security Update Guide for the update that applies to your product.

Vendor-listed fixes

  • 24.21.0-1

CVEs in this advisory 1

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed the advisory's last-updated date.
    • Added fixed versions: 24.21.0-1.
    • Added affected products: azl3 nodejs 24.20.0-1 on Azure Linux 3.0.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.