CVE-2026-25545Astro is a web framework.
Updated under an hour ago ()
Does this affect you?
It affects astro @astrojs/node. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.6 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
astro @astrojs/node astro:@astrojs/node | before 9.5.4 | NVD |
References
- https://github.com/withastro/astro/commit/e01e98b063e90d274c42130ec2a60cc0966622c9patch
- https://github.com/withastro/astro/releases/tag/%40astrojs%2Fnode%409.5.4product, release-notes
- https://github.com/withastro/astro/security/advisories/GHSA-qq67-mvv5-fw3gexploit, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.