Out-of-bounds access in WebKit leading to Safari crash
CVE-2026-43676 is an out-of-bounds access vulnerability in WebKit affecting Safari and Apple platforms that use the WebKit web-content processing stack. Apple states the issue was addressed with improved bounds checking. Processing maliciously crafted web content can trigger the out-of-bounds access condition and cause an unexpected Safari crash. Fixed versions listed by Apple are Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WebKit vulnerability in Apple platforms where malicious web content may cause Safari to crash unexpectedly.
An out-of-bounds access vulnerability in web content processing that could cause an unexpected Safari crash.
A macOS Tahoe web content processing vulnerability involving out-of-bounds access that may cause an unexpected Safari crash.
An out-of-bounds access vulnerability in Apple web content processing that could cause an unexpected Safari crash.
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.