What is CVE-2026-59731?

CVE-2026-59731 is a high-severity vulnerability in Withastro Astro, classified under CWE-647. CVSS score: 8.2/10. Published 2026-07-08.

How severe is CVE-2026-59731?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Withastro Astro

CVE-2026-59731

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…

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

Withastro Astro — versions >= 6.4.7, < 6.4.8

Weakness classification (CWE)

CWE-647

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-59731?: CVE-2026-59731 is a high-severity vulnerability in Withastro Astro, classified under CWE-647. CVSS score: 8.2/10. Published 2026-07-08.
How severe is CVE-2026-59731?: High severity. CVSS v3 base score is 8.2 out of 10.