Critical Use‑After‑Free RCE in Apple Safari (CVE‑2026‑64715) Threatens Web Users
What It Is — Apple Safari’s JavaScriptCore engine contains a use‑after‑free flaw in the B3 ReduceStrength phase. The bug allows a remote attacker to execute arbitrary code in the renderer process when a victim visits a malicious web page or opens a crafted file.
Exploitability — The vulnerability requires user interaction but can be weaponized with a simple malicious link; a proof‑of‑concept has been disclosed. CVSS 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates a high likelihood of successful exploitation.
Affected Products — Apple Safari (all versions prior to the August 2026 security update).
Why It Matters for Compliance & Audit Readiness
- SOC 2 Change Management (CC6.1) and System Operations controls demand timely patching of client‑side software; unpatched browsers constitute a control gap.
- Continuous evidence of patch deployment is required to demonstrate due diligence during a SOC 2 audit.
- A successful exploit could compromise data confidentiality and integrity, jeopardizing the organization’s trust posture and audit defensibility.
Recommended Actions
- Deploy Apple’s August 2026 Safari security update to every endpoint immediately.
- Verify patch rollout with your endpoint‑management solution and retain logs as audit evidence.
- Update your SOC 2 asset inventory to reflect the patched version and map the change to the relevant control.
- Enforce browser‑hardening policies (e.g., block outdated versions, enable site isolation).