AppleCVE-2026-43670

Apple Safari: protection mechanism failure

CVE-2026-43670 · Published Aug 25, 2026 · updated Aug 27, 2026

High8.8

Fix: upgrade to 26.5 or later (3 fixed versions below)

A Content Security Policy bypass was addressed with improved enforcement in AudioWorklet contexts. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5. Processing maliciously crafted web content may bypass Content Security Policy.

Affected versions

Package	Affected	Fixed in
Safari Product	< 26.5	26.5
iOS and iPadOS Product	< 18.7.9	18.7.9
	< 26.5	26.5
macOS Product	< 26.5	26.5

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity from: CISA (its enrichment of the CVE record)
Weakness: CWE-693

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