CVE-2026-43802
Out-of-bounds write in macOS can allow an app to crash the system (DoS).
Is CVE-2026-43802 being exploited?
Not confirmed. CVE-2026-43802 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 0.62% probability of exploitation in the next 30 days.
How severe is CVE-2026-43802?
CVE-2026-43802 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-2026-43802?
Yes. A fix has been recorded for CVE-2026-43802. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43802 affect?
CVE-2026-43802 affects macOS Sequoia (<15.7.8), macOS Sonoma (<14.8.8), macOS Tahoe (<26.6). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43802?
Install macOS updates: Sequoia 15.7.8, Sonoma 14.8.8, Tahoe 26.6 immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A local or app-originated out-of-bounds write can cause unexpected system termination (denial of service); may enable further exploitation if chained.
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.