Vulnerabilities in pkg:npm/@astrojs/netlify

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4233-jc72-56c5",
  "modified" : "2026-09-30T23:40:12Z",
  "published" : "2026-09-30T23:40:12Z",
  "aliases" : [ "CVE-2026-102983" ],
  "summary" : "Astro: Netlify Image CDN allowlist bypass enables SSRF",
  "details" : "## Summary\n\nThe `@astrojs/netlify` adapter generated regular expressions for Netlify Image CDN remote-image allowlists without anchoring them to the beginning of the URL. Netlify evaluates these expressions with `RegExp.test()`, so an allowed image origin appearing anywhere in a URL, including its path or query string, could satisfy the allowlist.\n\nFor example, an application allowing `images.example.com` could accept a source URL such as:\n\n```text\nhttp://127.0.0.1:6379/?url=https://images.example.com/image.png\n```\n\nThe allowlist matched the approved origin in the query string, but Netlify parsed and fetched the URL whose actual host was `127.0.0.1`.\n\n## Impact\n\nAn unauthenticated attacker can bypass the configured `image.domains` or `image.remotePatterns` allowlist through the public `/.netlify/images` endpoint and cause Netlify Image CDN to make requests to attacker-selected URLs. This may allow probing or reaching internal services, depending on Netlify's network-level egress protections.\n\nThe Image CDN attempts to transform responses as images, which limits direct response exfiltration. No confidentiality or integrity impact has been demonstrated.\n\n## Affected versions\n\n`@astrojs/netlify` versions from 5.2.0 through 8.2.3.\n\n## Patches\n\nFixed in `@astrojs/netlify` 8.2.4. Generated remote-image allowlist expressions are now anchored to both the beginning and end of the source URL.\n\n## Workarounds\n\nUpgrade to `@astrojs/netlify` 8.2.4 or later. Before upgrading, disable Netlify Image CDN by setting `imageCDN: false` in the adapter configuration, or remove remote image allowlist entries.\n\n## Credits\n\nReported by @pacocartones.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@astrojs/netlify"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.2.0"
      }, {
        "fixed" : "8.2.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.2.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/withastro/astro/security/advisories/GHSA-4233-jc72-56c5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102983"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/withastro/astro/pull/17752"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/withastro/astro/commit/e362d4cf540b27730482455c8fc02efe57d16702"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/withastro/astro"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/withastro/astro/releases/tag/@astrojs/netlify@8.2.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-625", "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-30T23:40:12Z",
    "nvd_published_at" : "2026-09-30T15:22:22Z"
  }
}