Crypto exchange Binance has warned iPhone users about an iOS vulnerability that could allow malicious apps to access sensitive data stored by other apps. Here are the details.
Researchers say flaw remains unpatched
In a post published on X , Binance says that a vulnerability called worse_query could allow “malicious apps to read local files from other apps, putting seed phrases, private keys, and login credentials at risk across the entire ecosystem.”
Binance says the flaw affects iOS 26.7.1, iOS 27.0.1, and iOS 27.2. However, a Community Note points out that researchers describe the vulnerability as an unpatched zero-day and that Apple’s latest security updates, including iOS 27.2.1 (the current version at the time of writing), do not mention a fix.
That said, in addition to updating their devices, Binance recommends that iPhone crypto holders take the following immediate actions:
- Delete any apps installed from untrusted sources (such as sideloaded or manually signed IPAs).
- Update iOS and all apps to the latest official versions.
- If you suspect a breach, transfer funds to a new wallet created on a clean device and reset all active login sessions.
The vulnerability was disclosed by security researchers @0xjohnny and @forcequitOS, who published a proof of concept on GitHub demonstrating how it can be used to bypass iOS sandbox protections, which normally prevent apps from accessing each other’s files.
Researcher @forcequitOS also noted that neither iOS 27.2.1 nor iOS 27.3 beta 1 patches the vulnerability.
Although the researcher describes the code as intended for developers and not useful on its own, other developers have already built apps using it, including a file manager that can access, modify, and delete data belonging to other apps without requiring a jailbreak.
According to The Hacker News, neither Binance nor the researchers have reported any attacks or cryptocurrency thefts involving the vulnerability so far.
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