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Astro: Netlify Image CDN allowlist bypass enables SSRF

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-102983

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-102983

astro

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

netlify

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "withastro",
    "product": "astro",
    "versions": [
      {
        "status": "affected",
        "version": ">= 5.2.0, < 8.2.4"
      }
    ]
  },
  {
    "vendor": "@astrojs",
    "product": "netlify",
    "versions": [
      {
        "status": "affected",
        "version": ">= 5.2.0, < 8.2.4"
      }
    ]
  }
]
Related CVEs
CVE-2026-102983

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#4598 · Revision 1
Added to Heist Feed
Publisher date
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