Live › vulnerability › CVE-2021-30858
Go to dashboardA use-after-free bug in Apple's WebKit engine lets a crafted web page run code when processed by iOS, iPadOS, or macOS. It is listed as actively exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Apple iOS, iPadOS, and macOS | vendor | – | – |
Check the installed OS version under Settings > General > About (iOS/iPadOS) or About This Mac (macOS) and compare it with the patched release in Apple's security notes.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Apple iOS, iPadOS, and macOS WebKit contain a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-30858")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.