CVE-2026-28891
Sandbox escape via race condition; app could escape sandbox.
Is CVE-2026-28891 being exploited?
Not confirmed. CVE-2026-28891 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 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-28891?
CVE-2026-28891 is rated High with a CVSS score of 8.1. 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-2026-28891?
Yes. A fix has been recorded for CVE-2026-28891. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-28891 affect?
CVE-2026-28891 affects macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-28891?
Update to fixed macOS versions ASAP
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local sandbox escape enables access to restricted resources and user data.
Patch when possible
- affected< 14.8.5
- affected< 15.7.5
- affected< 26.4
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.