{"cve":"CVE-2026-25545","nvd":{"published":"2026-02-24T01:16:13.087","modified":"2026-06-17T10:24:49.877","status":"Analyzed","description":"Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page (eg. `404.astro` or `500.astro`) are vulnerable to SSRF. If the `Host:` header is changed to an attacker's server, it will be fetched on `/500.html` and they can redirect this to any internal URL to read the response body through the first request. An attacker who can access the application without `Host:` header validation (eg. through finding the origin IP behind a proxy, or just by default) can fetch their own server to redirect to any internal IP. With this they can fetch cloud metadata IPs and interact with services in the internal network or localhost. For this to be vulnerable, a common feature needs to be used, with direct access to the server (no proxies). Version 9.5.4 fixes the issue.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":8.6},"cwes":["CWE-918"],"references":["https://github.com/withastro/astro/commit/e01e98b063e90d274c42130ec2a60cc0966622c9","https://github.com/withastro/astro/releases/tag/%40astrojs%2Fnode%409.5.4","https://github.com/withastro/astro/security/advisories/GHSA-qq67-mvv5-fw3g"],"products":["astro:\\@astrojs\\/node"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-25545","score":0.01933,"percentile":0.80039,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qq67-mvv5-fw3g","url":"https://osv.dev/vulnerability/GHSA-qq67-mvv5-fw3g","summary":"Astro has Full-Read SSRF in error rendering via Host: header injection","modified":"2026-03-30T19:48:54.949009Z","packages":[{"ecosystem":"npm","name":"@astrojs/node","purl":"pkg:npm/%40astrojs/node","ranges":["<9.5.4"],"fixed":["9.5.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}