WebKit Content Security Policy enforcement bypass
CVE-2026-43660 is a WebKit validation flaw in Apple platforms where processing maliciously crafted web content may prevent Content Security Policy (CSP) from being enforced. Apple states the issue was addressed with improved logic. The vulnerability affects WebKit as shipped in Safari and multiple Apple operating systems, including Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5. The available vendor description does not identify the specific vulnerable function or code path, only that the root cause was a validation issue in WebKit.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A validation issue in Apple web content processing that may allow maliciously crafted web content to prevent Content Security Policy from being enforced.
A validation issue in Apple software for macOS Sonoma and macOS Sequoia where maliciously crafted web content may prevent Content Security Policy from being enforced.
A WebKit vulnerability that may allow malicious web content to bypass Content Security Policy enforcement.
A web content validation vulnerability in macOS Tahoe that may prevent Content Security Policy enforcement.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.