CVE-2026-59731

HIGH8.2

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

Published Jul 8, 2026

Modified 3 weeks ago

Details

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.

References

WEB

https://github.com/withastro/astro/commit/27c80ea92248993e5fce94b2c26d87d611ab6785

WEB

https://github.com/withastro/astro/pull/17109

WEB

https://github.com/withastro/astro/releases/tag/astro@6.4.8

WEB

https://github.com/withastro/astro/security/advisories/GHSA-vj59-8hwv-xxmv

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-59731

CVSS Analysis