A memory corruption issue was addressed with improved input validation. This issue is fixed in 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, watchOS 26.5. Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory.
PoC: CVE-2026-28956
"Requiem" - AppleJPEGXL UaF vulnerability PoC code.
PoC: CVE-2026-28956-jxl-messages-surface
JPEG XL auto-decodes in the iOS Messages preview path — delivery-surface finding for CVE-2026-28956 (AppleJPEGXL), with patch-diff attribution (libjxl 0.10.4->0.10.5) and an honest reliability check on the public PoC.
PoC: CVE-2026-28956
CVE-2026-28956 - Draft or TODO
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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