CVE-2026-102983: @astrojs Netlify

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• @astrojs Netlify: from 5.2.0, before 8.2.4 (fixed in 8.2.4)
• Withastro Astro: from 5.2.0, before 8.2.4 (fixed in 8.2.4)

Published 2026-09-30. Last modified 2026-09-30.