CVE-2026-59731CWE-647

Astro 6.4.7 Authorization Bypass via Decode Iteration Limit and Rewrite Path Canonicalization Mismatch

High · published July 8, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
39.3
In the wild
Unconfirmed
What it is

Astro is a web framework for content-driven websites. Version 6.4.7 performs authorization decisions on a partially decoded pathname after reaching the iterative URL decoder limit, while later rewrite route matching performs an additional decodeURI() operation and can resolve the request to a protected route. This issue is fixed in version 6.4.8.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00466 · 39.3th percentile
Weakness
CWE-647 · Use of Non-Canonical URL Paths for Authorization Decisions
Published
2026-07-08T16:27Z
EPSS history
Timeline
  • 08 JUL 16:27Z
    Astro 6.4.7 Authorization Bypass via Decode Iteration Limit and Rewrite Path Canonicalization Mismatch
    cvelistv5