CVE-2026-43731
Safari use-after-free via malicious web content may cause memory corruption.
Is CVE-2026-43731 being exploited?
Not confirmed. CVE-2026-43731 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 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-43731?
CVE-2026-43731 is rated High with a CVSS score of 8.8. 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-2026-43731?
Yes. A fix has been recorded for CVE-2026-43731. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43731 affect?
CVE-2026-43731 affects Safari 26.5.2+, iOS 26.5.2+, iPadOS 26.5.2+, macOS Tahoe 26.5.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43731?
Update to Safari 26.5.2 / iOS 26.5.2 / macOS Tahoe 26.5.2.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Memory corruption could crash the browser or cause DoS; no confirmed remote code execution.
Patch when possible
- affected< 18.7.10
- affected< 26.5.2
- affected< 26.5.2
- affected< 26.5.2
- 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.