Apple Safari CVE-2026-64784

Exploitation requires the target user to actively navigate to attacker-controlled web content using Safari (or another WebKit-based browser, since iOS and iPadOS mandate WebKit for all browsers) on an unpatched Apple device. The CVSS vector (UI:R) confirms that user interaction is mandatory - exploitation cannot occur passively without the victim visiting a malicious page. No attacker authentication is required (PR:N), the attack is network-reachable (AV:N), and complexity is low (AC:L). Key limiting factors include: the victim must take the action of visiting a malicious URL in a WebKit-based browser; the attack produces only a browser crash rather than persistent compromise or privilege escalation; and the device must be running a version below iOS/iPadOS 18.7.10, iOS/iPadOS 26.6.1, or macOS Tahoe 26.6.2. There is no special server-side configuration or non-default feature enablement required - the vulnerable code path is exercised during normal web content rendering.

The CVSS 3.1 base score of 4.3 (Medium) accurately reflects a constrained denial-of-service scenario: the attack is network-reachable at low complexity with no privilege requirement (AV:N/AC:L/PR:N), but it mandates active user interaction (UI:R) and produces only availability impact at low severity (A:L), with no confidentiality or integrity consequences. Real-world risk is correspondingly modest - the worst confirmed outcome is a Safari crash requiring the user to relaunch the browser, not persistent compromise or data exfiltration. There is no CISA KEV listing and no public exploit code identified, making opportunistic mass exploitation unlikely; even a mid-sized municipal IT team in leszno managing a large Apple device fleet can reasonably treat this as a standard scheduled-patch-cycle item rather than an emergency out-of-band remediation. One analytical tension worth flagging: the intelligence tags include 'Information Disclosure,' which is plausible for a CWE-125 class flaw but directly conflicts with the CVSS vector's C:N rating - defenders should monitor vendor advisories for clarification if memory disclosure is later confirmed as a realistic impact. The absence of EPSS data in the provided intelligence prevents probabilistic exploitation-likelihood forecasting.

An attacker hosts a web page containing specially crafted HTML, CSS, or JavaScript designed to trigger the out-of-bounds read in Safari's web content processing engine. A user on an unpatched Apple device visits the page - delivered via phishing link, malicious advertisement, or a compromised legitimate site - causing Safari to crash and requiring manual restart. No public proof-of-concept code has been identified, and the attack produces a denial-of-service outcome rather than remote code execution based on current vendor disclosure.