CVE-2026-59731
URL-decoding mismatch in Astro enables authorization bypass to protected routes.
Is CVE-2026-59731 being exploited?
Not confirmed. CVE-2026-59731 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.47% probability of exploitation in the next 30 days.
How severe is CVE-2026-59731?
CVE-2026-59731 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-59731?
Yes. A fix has been recorded for CVE-2026-59731. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-59731 affect?
CVE-2026-59731 affects Astro <= 6.4.7, Astro 6.4.8 (patched). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-59731?
Upgrade Astro to v6.4.8 and audit route/authorization logic.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authorization bypass via double-decode mismatch allows attackers to reach protected/admin routes and access restricted content.
Patch when possible
- affected>= 6.4.7 and < 6.4.8
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.