Stack Overflow in Apple WebRTC leading to Safari crash
CVE-2026-43718 is a stack overflow vulnerability in Apple’s WebRTC-related web content processing path. Apple states that the issue was addressed with improved input validation and that processing maliciously crafted web content may lead to an unexpected Safari crash. The vulnerability affects Safari 26.5.2 prior versions and the corresponding web-content stack in iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. Based on the available information, the flaw is triggered during handling of attacker-controlled web content and results in a stack overflow condition causing browser instability.
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Recent activity
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A WebRTC vulnerability in Apple platforms where malicious web content may cause Safari to crash unexpectedly.
A stack overflow vulnerability in web content processing that could cause an unexpected Safari crash.
A macOS Tahoe web content processing vulnerability involving stack overflow that may cause an unexpected Safari crash.
A stack overflow vulnerability in Apple web content processing that could cause an unexpected Safari crash.
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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.