macOS is widely deployed in enterprises; sandbox escape can enable code execution and persistent compromise of endpoints.
CVE-2026-64738
macOS sandbox escape allowing malicious apps to break out of the sandbox.
Is CVE-2026-64738 being exploited?
Not confirmed. CVE-2026-64738 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 0.57% probability of exploitation in the next 30 days.
How severe is CVE-2026-64738?
CVE-2026-64738 is rated Critical with a CVSS score of 9.8. 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-2026-64738?
Yes. A fix has been recorded for CVE-2026-64738. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64738 affect?
CVE-2026-64738 affects macOS Sequoia (pre-15.7.8), macOS Sonoma (pre-14.8.8), macOS Tahoe (pre-26.6). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64738?
Apply Apple security updates immediately; restrict untrusted apps and enforce MDM policies.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local malicious app can escape sandbox to execute code or escalate privileges, enabling data theft or persistent compromise.
Immediate action required
- affected< 18.7.10
- affected< 14.8.8
- affected< 15.7.8
- affected< 26.6
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.