critical severityConfidence mediumHistorical record

@fastify/multipart aborted upload DoS

@fastify/multipart aborted uploads can cause denial of service. Upgrade to the patched release.

Also tracked as CVE-2026-18549

First observed
Aug 16, 2026
Last observed
Aug 16, 2026
Last reviewed
Sep 20, 2026
Tracking ended
Aug 16, 2026
JSON recordArtifact CSVSTIX 2.1 bundle

Uncertainty and limitations

Read the evidence limits before acting on this record.

Confirm exact fixed version against the live advisory.

  • Campaign tracks CVE-2026-18549 only.
  • Does not invent CVSS or fixed versions beyond cited sources.
  • HOL blog is operator guidance.

Timeline

Reviewed events, oldest first, each tied to a verified source.

  1. Disclosure

    CVE-2026-18549 @fastify/multipart aborted upload DoS disclosed.

  2. Update

    HOL Guard published operator coverage.

Publication clock: 860.0 hours from reviewed disclosure timestamp to HOL publication; 12-hour critical target; historical backfill outside target.

Guard coverage and non-coverage

What Guard's reviewed coverage assertions do and do not claim for this campaign.

No Guard coverage mapping is published for this record.

Defensive policy guidance

Reviewed starting points for defending against this campaign's artifact classes.

No campaign-specific policy guidance is published.

Sources

Every claim on this record is traceable to the sources below.

Reviewed in full by HOL Guard Security Publishing.

Published
Last full review
Last modified

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Record HGTC-2026-D44A9EBF.