{"id":"CVE-2026-102983","aliases":["EUVD-2026-89969","GHSA-4233-jc72-56c5"],"status":"published","title":"Astro: Netlify Image CDN allowlist bypass enables SSRF","description":"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.","severity":{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0031,"percentile":0.24234,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-625","CWE-918"],"published":"2026-09-30T14:32:03Z","modified":"2026-10-28T02:30:21Z","fixes":[{"ecosystem":"npm","package":"@astrojs/netlify","fixed_in":["8.2.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@astrojs/netlify","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.2.0"},{"last_affected":"8.2.3"},{"fixed":"8.2.4"}]}]},{"source":"osv","ecosystem":"npm","package":"@astrojs/netlify","ranges":[{"type":"SEMVER","events":[{"introduced":"5.2.0"},{"fixed":"8.2.4"}]}]}],"products":[{"vendor":"@astrojs","product":"netlify"},{"vendor":"withastro","product":"astro"}],"references":[{"url":"https://github.com/withastro/astro/security/advisories/GHSA-4233-jc72-56c5","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/withastro/astro/pull/17752","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/withastro/astro/commit/e362d4cf540b27730482455c8fc02efe57d16702","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/withastro/astro/releases/tag/@astrojs/netlify@8.2.4","tags":["x_refsource_MISC","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102983","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4233-jc72-56c5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102983.json","tags":["advisory"]},{"url":"https://github.com/withastro/astro","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-102983","title":"Astro: Netlify Image CDN allowlist bypass enables SSRF","description":"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.","status":"published","published":"2026-09-30T14:32:03.861Z","modified":"2026-09-30T16:24:47.048Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-625","CWE-918"],"updated_at":"2026-11-02T13:38:54.394896Z"}],"euvd":[{"id":"EUVD-2026-89969","description":"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.","status":"published","published":"2026-09-30T14:32:03Z","modified":"2026-09-30T16:24:47Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T17:27:48.536397Z"}],"ghsa":[{"id":"GHSA-4233-jc72-56c5","title":"Astro: Netlify Image CDN allowlist bypass enables SSRF","description":"## 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.","status":"published","published":"2026-09-30T23:40:12Z","modified":"2026-09-30T23:40:13Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-625","CWE-918"],"updated_at":"2026-11-02T14:41:23.783773Z"}],"nvd":[{"id":"CVE-2026-102983","description":"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.","status":"published","published":"2026-09-30T15:22:22.8Z","modified":"2026-09-30T19:38:27.293Z","cvss":[{"version":"4.0","score":6.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-625","CWE-918"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"CVE-2026-102983","title":"Astro: Netlify Image CDN allowlist bypass enables SSRF","description":"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.","status":"published","published":"2026-09-30T14:32:03.861Z","modified":"2026-10-28T02:30:21.058878088Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-625","CWE-918"],"updated_at":"2026-11-02T15:44:53.83521Z"},{"id":"GHSA-4233-jc72-56c5","title":"Astro: Netlify Image CDN allowlist bypass enables SSRF","description":"## 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.","status":"published","published":"2026-09-30T23:40:12Z","modified":"2026-09-30T23:45:04.012782965Z","cvss":[{"version":"4.0","score":6.3,"vector":"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","level":"medium"}],"cwes":["CWE-625","CWE-918"],"updated_at":"2026-11-02T15:46:36.092962Z"}]}}