CVE-2026-43779
macOS logic flaw allows an app to intercept network connections of other processes.
Is CVE-2026-43779 being exploited?
Not confirmed. CVE-2026-43779 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 0.63% probability of exploitation in the next 30 days.
How severe is CVE-2026-43779?
CVE-2026-43779 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-2026-43779?
Yes. A fix has been recorded for CVE-2026-43779. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43779 affect?
CVE-2026-43779 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-2026-43779?
Apply the listed macOS updates immediately; restrict untrusted apps until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local malicious app can intercept other processes' network connections, enabling eavesdropping, session hijack, credential theft, or further compromise.
Immediate action required
- 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.