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CVE-2025-31277 is a memory-corruption vulnerability in Apple WebKit/JavaScriptCore triggered when Safari or another affected WebKit consumer processes maliciously crafted web content. Apple addressed the issue through improved memory handling. Public reporting associates the flaw with JavaScriptCore JIT optimization/type-confusion behavior and its use as an initial renderer-compromise stage in the DarkSword exploit chain. Apple fixed the issue in Safari 18.6, iOS 18.6, iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6, visionOS 2.6, and watchOS 11.6.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
51 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A JavaScriptCore JIT optimization/type-confusion memory-corruption vulnerability used by the legacy DarkSword path to establish RCE primitives on iOS 18.4 and 18.5.
A WebKit vulnerability used as part of a WebKit-to-kernel iPhone exploit chain to deploy spyware and steal sensitive device data.
A WebKit vulnerability used in a malicious Packagist-theme campaign to compromise vulnerable iPhones through mobile Safari and begin an exploit chain that ultimately obtains kernel-level read/write access and deploys spyware.
A known WebKit vulnerability used as part of a malicious website-theme supply-chain campaign to compromise selected iPhone visitors and enable spyware delivery and cryptocurrency-wallet recovery-phrase theft.
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.