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CVE-2026-20690 is a memory-safety vulnerability in Apple CoreMedia affecting iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. The flaw occurs while processing an audio stream in a maliciously crafted media file and was addressed by improved bounds checking. Apple describes the issue as an out-of-bounds access that may terminate the affected process. Additional reporting indicates the flaw resides in the CoreMedia framework and can result from improper validation of user-supplied data during media parsing, potentially causing a write past the end of an allocated buffer on affected macOS installations. The issue was fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, and watchOS 26.4.
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What an attacker gets, and what they’ve been doing with it.
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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.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CoreMedia out-of-bounds access vulnerability triggered by malicious audio streams in media files.
An out-of-bounds access vulnerability in audio stream processing that may terminate the process.
An out-of-bounds access vulnerability in macOS Sequoia that could terminate a process when handling a maliciously crafted media file audio stream.
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.