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CVE-2026-28907 is a WebKit input-validation vulnerability affecting Safari and multiple Apple operating systems that embed WebKit. Processing maliciously crafted web content may prevent Content Security Policy (CSP) from being enforced. Apple states the issue was addressed with improved input validation. The flaw enables attacker-controlled web content to interfere with browser-enforced CSP restrictions, weakening a key client-side security boundary intended to limit script execution and resource loading.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An input validation issue in Apple web content processing that may allow maliciously crafted web content to prevent Content Security Policy from being enforced.
An input 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 vulnerability in macOS Tahoe that may prevent Content Security Policy enforcement.
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.