cvedb.io
CVE-2026-27729
MEDIUM · CVSS 5.9
EPSS exploitation probability: 0%
Published 2026-02-24T01:16:15.700 · Last modified 2026-06-17T10:27:34.073

Summary

Astro is a web framework. In versions 9.0.0 through 9.5.3, Astro server actions have no default request body size limit, which can lead to memory exhaustion DoS. A single large POST to a valid action endpoint can crash the server process on memory-constrained deployments. On-demand rendered sites built with Astro can define server actions, which automatically parse incoming request bodies (JSON or FormData). The body is buffered entirely into memory with no size limit — a single oversized request is sufficient to exhaust the process heap and crash the server. Astro's Node adapter (`mode: 'standalone'`) creates an HTTP server with no body size protection. In containerized environments, the crashed process is automatically restarted, and repeated requests cause a persistent crash-restart loo

Affected products

astro — \@astrojs\/node

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.