Disclosure summary
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.
Source-reported weakness categories
CWE-625, CWE-918
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
GitHub Reviewed Security Advisories · GHSA-4233-jc72-56c5
Open original source · Updated Sep 30, 2026
Astro: Netlify Image CDN allowlist bypass enables SSRF
Source severity: MEDIUM / 6.3
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| npm | @astrojs/netlify | >= 5.2.0, | 8.2.4 |
NIST National Vulnerability Database · NVD-CVE-2026-102983
Open original source · Updated Sep 30, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
Original records & references
PUBLISHED 2026-09-30T11:22:22-04:00
MODIFIED 2026-09-30T15:38:27-04:00
INGESTED 2026-10-06T11:44:58-04:00