Medium 6.3Published Sep 30, 2026

CVE-2026-102983Astro: Netlify Image CDN allowlist bypass enables SSRF

Updated under an hour ago (2026-10-19 09:50 UTC)

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It affects withastro astro and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for withastro astro

Exploited in the last 30 days

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.

CVSS: 6.3 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-625, CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 30, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

withastro astro withastro:astro (from the name)	from 5.2.0, < 8.2.4	CNA record
@astrojs netlify astrojs:netlify (from the name)	from 5.2.0, < 8.2.4	CNA record

References

https://github.com/withastro/astro/security/advisories/GHSA-4233-jc72-56c5x-refsource-confirm
https://github.com/withastro/astro/pull/17752x-refsource-misc
https://github.com/withastro/astro/commit/e362d4cf540b27730482455c8fc02efe57d16702x-refsource-misc
https://github.com/withastro/astro/releases/tag/@astrojs/netlify@8.2.4x-refsource-misc

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.