Astro: Netlify Image CDN allowlist bypass enables SSRF — GHSA-4233-JC72-56C5

Summary

## Summary The `@astrojs/netlify` adapter generated regular expressions for Netlify Image CDN remote-image allowlists without anchoring them to the beginning of the URL. Netlify evaluates these expressions with `RegExp.test()`, so an allowed image origin appearing anywhere in a URL, including its path or query string, could satisfy the allowlist. For example, an application allowing `images.example.com` could…

Timeline

Published by source

2026-09-30

Risk context

• Reported severity or threat level: medium.
• Reported CVSS score: 6.3 out of 10.
• Review exposure for the affected product or family: npm: @astrojs/netlify.

Product

npm: @astrojs/netlify

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-4233-JC72-56C5

Source

GitHub

Vendor

GitHub

Published by source

2026-09-30

Last source activity

2026-09-30

Additional identifiers

CVE-2026-102983

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.