Allocation of Resources Without Limits or Throttling Affecting astro package, versions <6.0.0-beta.20


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

Exploit Maturity
Proof of Concept

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  • Snyk IDSNYK-JS-ASTRO-15763371
  • published25 Mar 2026
  • disclosed24 Mar 2026
  • creditaisafe-bot

Introduced: 24 Mar 2026

NewCVE-2026-29772  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade astro to version 6.0.0-beta.20 or higher.

Overview

astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the /_server-islands/[name] route handler, which buffers and parses the entire request body as JSON without enforcing a size limit. An attacker can cause the server process to exhaust available memory and crash by sending a single unauthenticated request with a crafted payload containing many small JSON objects, resulting in significant memory amplification.

References

CVSS Base Scores

version 4.0
version 3.1