Sensitive user data access in WebKit
CVE-2026-28958 is an Apple WebKit vulnerability in which an app may be able to access sensitive user data. Apple states the issue was addressed with improved data protection. The vulnerability is documented as affecting Safari 26.5, iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, and visionOS 26.5, with additional mention contexts indicating impact on macOS Sonoma and macOS Sequoia through Safari/WebKit updates. The available advisory text does not identify the specific vulnerable function or code path.
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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
12 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 cause an unexpected process crash via maliciously crafted web content.
An input validation issue in Apple software for macOS Sonoma and macOS Sequoia where maliciously crafted web content may cause an unexpected process crash.
An information disclosure vulnerability in WebKit that may allow an app to access sensitive user data.
A web content vulnerability in macOS Tahoe that may lead to an unexpected process crash.
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.