Sensitive data leak via malicious website in Apple zlib
CVE-2026-28920 is an information disclosure vulnerability in Apple platforms, attributed in the provided advisories to zlib. Apple states that the issue was addressed with additional validation. Successful exploitation occurs when a user visits a maliciously crafted website, which can trigger leakage of sensitive data. The issue is listed as fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5. No further technical detail about the precise vulnerable function or code path is provided in the supplied content.
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Exploits
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Recent activity
23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An information disclosure vulnerability affecting zlib where visiting a maliciously crafted website may leak sensitive data.
An information leakage vulnerability in macOS Tahoe where visiting a maliciously crafted website may leak sensitive data.
A macOS Sonoma information leakage vulnerability where visiting a maliciously crafted website may leak sensitive data.
An information leakage vulnerability that could expose sensitive data when visiting a maliciously crafted website.
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.