CVE-2026-43730
Malicious app can fingerprint users on Apple OS prior to 26.6.
Is CVE-2026-43730 being exploited?
Not confirmed. CVE-2026-43730 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 0.51% probability of exploitation in the next 30 days.
How severe is CVE-2026-43730?
CVE-2026-43730 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-2026-43730?
Yes. A fix has been recorded for CVE-2026-43730. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43730 affect?
CVE-2026-43730 affects iOS < 26.6, iPadOS < 26.6, macOS Tahoe < 26.6, tvOS < 26.6, and 2 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43730?
Upgrade devices to OS 26.6+ immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A malicious app can fingerprint and track users across apps, enabling deanonymization and targeted tracking of users.
Patch when possible
- affected< 26.6
- affected< 26.6
- affected< 26.6
- affected< 26.6
- 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.