CVE-2026-102983 · GHSA-4233-jc72-56c5

Astro: Netlify Image CDN allowlist bypass enables SSRF

Risk score: 47/100
CVSS: 6.3 v4.0
Exploit chance (30 days): 0.3%
Published: 30 Sep 2026

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What to know

What it is: Astro is a web framework for content-driven websites. From 5.2.0 until 8.2.4, the @astrojs/netlify adapter generates regular expressions for Netlify Image CDN remote-image allowlists without anchoring them to the beginning of the URL. Because Netlify evaluates these expressions with RegExp.test(), an allowed origin ap…
Affected: @astrojs/netlify (npm) >= 5.2.0, <= 8.2.3
Fix: Upgrade @astrojs/netlify to 8.2.4 or later.
Exploitation: No known exploitation

Why it is Yellow

CVSS 6.3 medium
On your watchlist: npm

Affected packages

Package	Ecosystem	Vulnerable	Fixed in
@astrojs/netlify	npm	>= 5.2.0, <= 8.2.3	8.2.4

References

Original description

Astro is a web framework for content-driven websites. From 5.2.0 until 8.2.4, the @astrojs/netlify adapter generates regular expressions for Netlify Image CDN remote-image allowlists without anchoring them to the beginning of the URL. Because Netlify evaluates these expressions with RegExp.test(), an allowed origin appearing only in a source URL's path or query can satisfy image.domains or image.remotePatterns while the URL's actual host remains attacker-controlled. An unauthenticated request to the public /.netlify/images endpoint can therefore cause the Image CDN to request attacker-selected URLs and may probe or reach internal services. Netlify egress protections may constrain reachable targets, and image transformation limits direct response exfiltration; no confidentiality or integrity impact has been demonstrated. This issue is fixed in version 8.2.4.

Last activity 30 Sep 2026. Patch Forecast updates every hour.