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CVE-2026-28920 is an information disclosure vulnerability in Apple platforms, attributed in advisories to zlib, where visiting a maliciously crafted website may leak sensitive data. Apple states the issue was addressed with additional validation. The vulnerability affects multiple Apple operating systems, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, prior to the patched releases 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. Publicly available details do not identify the precise vulnerable function or code path beyond the association with zlib and web-triggered sensitive data leakage.
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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.
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.
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.