CVE-2026-59731

Summary

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.

Affected Software

Weaknesses

• CWE-647: CWE-647: Use of Non-Canonical URL Paths for Authorization Decisions

References

• https://github.com/withastro/astro/security/advisories/GHSA-vj59-8hwv-xxmv
• https://github.com/withastro/astro/pull/17109
• https://github.com/withastro/astro/commit/27c80ea92248993e5fce94b2c26d87d611ab6785
• https://github.com/withastro/astro/releases/tag/astro@6.4.8

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