{"id":"CVE-2026-102983","state":"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.","publishedAt":"2026-09-30T14:32:03.861Z","updatedAt":"2026-09-30T16:24:47.048Z","severity":{"score":6.3,"label":"Medium","version":"4.0","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","source":"GitHub_M"},"assigner":"GitHub_M","products":["withastro astro","@astrojs netlify"],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":">= 5.2.0, < 8.2.4","status":"affected"}]},{"vendor":"@astrojs","product":"netlify","versions":[{"version":">= 5.2.0, < 8.2.4","status":"affected"}]}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-4233-jc72-56c5","https://github.com/withastro/astro/pull/17752","https://github.com/withastro/astro/commit/e362d4cf540b27730482455c8fc02efe57d16702","https://github.com/withastro/astro/releases/tag/@astrojs/netlify@8.2.4"],"weaknesses":["CWE-625","CWE-918"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102983.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102983","state":"PUBLISHED","datePublished":"2026-09-30T14:32:03.861Z","dateUpdated":"2026-09-30T16:24:47.048Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-29T20:46:08.333Z"},"containers":{"cna":{"title":"Astro: Netlify Image CDN allowlist bypass enables SSRF","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":">= 5.2.0, < 8.2.4","status":"affected"}]},{"vendor":"@astrojs","product":"netlify","versions":[{"version":">= 5.2.0, < 8.2.4","status":"affected"}]}],"references":[{"url":"https://github.com/withastro/astro/security/advisories/GHSA-4233-jc72-56c5","name":"https://github.com/withastro/astro/security/advisories/GHSA-4233-jc72-56c5","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/withastro/astro/pull/17752","name":"https://github.com/withastro/astro/pull/17752","tags":["x_refsource_MISC"]},{"url":"https://github.com/withastro/astro/commit/e362d4cf540b27730482455c8fc02efe57d16702","name":"https://github.com/withastro/astro/commit/e362d4cf540b27730482455c8fc02efe57d16702","tags":["x_refsource_MISC"]},{"url":"https://github.com/withastro/astro/releases/tag/@astrojs/netlify@8.2.4","name":"https://github.com/withastro/astro/releases/tag/@astrojs/netlify@8.2.4","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-625","lang":"en","description":"CWE-625: Permissive Regular Expression","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-30T14:33:11.551Z"},"source":{"advisory":"GHSA-4233-jc72-56c5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T16:22:22.386566Z","id":"CVE-2026-102983","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T16:24:47.048Z"}}]}}}