---
id: CVE-2026-102983
title: Astro is a web framework for content-driven websites
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. Be…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'
cwe:
  - CWE-625
  - CWE-918
vendor: withastro
product: astro
affected:
  - 'astro >= 5.2.0, < 8.2.4'
  - 'netlify >= 5.2.0, < 8.2.4'
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T15:22:22.800'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102983'
references:
  - url: >-
      https://github.com/withastro/astro/commit/e362d4cf540b27730482455c8fc02efe57d16702
    label: security-advisories@github.com
  - url: 'https://github.com/withastro/astro/pull/17752'
    label: security-advisories@github.com
  - url: 'https://github.com/withastro/astro/releases/tag/@astrojs/netlify@8.2.4'
    label: security-advisories@github.com
  - url: 'https://github.com/withastro/astro/security/advisories/GHSA-4233-jc72-56c5'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-30T15:07:05.384Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-30T16:22:22.386566Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.