CVE-2026-41321CWE-918

@astrojs/cloudflare: SSRF via redirect following in Cloudflare image-binding-transform endpoint

Low · published April 24, 2026

CVSS v3.1
2.2
EPSS
0%
Percentile
23.5
In the wild
Unconfirmed
What it is

@astrojs/cloudflare is an SSR adapter for use with Cloudflare Workers targets. Prior to 13.1.10, the fetch() call for remote images in packages/integrations/cloudflare/src/utils/image-binding-transform.ts uses the default redirect: 'follow' behavior. This allows the Cloudflare Worker to follow HTTP redirects to arbitrary URLs, bypassing the isRemoteAllowed() domain allowlist check which only validates the initial URL. This vulnerabiity is caused by an incomplete fix for CVE-2025-58179. This vulnerability is fixed in 13.1.10.

The record
Technical detail
CVSS v3.1
2.2 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00318 · 23.5th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-04-24T17:04Z
EPSS history
Timeline
  • 24 APR 17:04Z
    @astrojs/cloudflare: SSRF via redirect following in Cloudflare image-binding-transform endpoint
    cvelistv5