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CVE-2026-59730: CWE-601: URL Redirection to Untrusted Site ('Open Redirect') in withastro astro

0
Low
VulnerabilityCVE-2026-59730cvecve-2026-59730cwe-601
Published: 07/27/2026 (07/27/2026, 20:00:28 UTC)
Source: CVE Database V5
Vendor/Project: withastro
Product: astro

Description

Astro is a web framework for content-driven websites. In versions 8.1.0 through 11.0.1, when trailingSlash: 'always' is configured, the @astrojs/node standalone server's static file handler appends a trailing slash to request paths and issues a 301 redirect. Paths beginning with /\ (slash-backslash) were not recognized as internal paths, so the handler would echo the raw path back in the Location header. Because browsers treat \ as / per the WHATWG URL specification, the resulting redirect could resolve to an external host. Preconditions for exploitation: trailingSlash: 'always' must be set (non-default; the default is 'ignore'), the request path must not have a file extension in its final segment, and an attacker must deliver the crafted link to a user. This issue has been fixed in version 11.0.2.

CVSS v4.0

Score 2.1low

Attack Vector
Network
Attack Complexity
High
Attack Requirements
None
Privileges Required
None
User Interaction
Active
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
None
Subsq. Integrity
Low
Subsq. Availability
None
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-07-06T15:34:16.917Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a67c1be9c2644c7f8cb1245

Added to database: 07/27/2026, 20:38:22 UTC

Last updated: 07/28/2026, 03:07:14 UTC

Views: 5

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