A researcher has uncovered a flaw that could allow hackers to steal information from those using Mac OS X 10.5, also known as Leopard or Safari for the PC.
The flaw was found by open-source software developer Brian Mastenbrook. It occurs when the Safari browser interacts with RSS feeds and makes the personal information of the user vulnerable.
"Safari is vulnerable to an attack that allows a malicious web site to read files on a user's hard drive without user intervention," Mastenbrook wrote on his blog.
"This can be used to gain access to sensitive information stored on the user's computer, such as emails, passwords or cookies, that could be used to gain access to the user's accounts on some web sites."
While Mastenbrook understandably does not go into detail, he said that people using OS X 10.5 are vulnerable no matter what browser they are using, and that PC users are at risk if using the Safari browser.
Mastenbrook has published a suggested workaround for Apple users but advises PC users of Safari to change browser for the moment.
The researcher is regarded as a reliable source who has in the past found other flaws with Apple's software.
Cotton seedling freezes to death as Chang'e-4 shuts down for the Moon's 14-day lunar night
Fortnite easily out-earns PUBG, Assassin's Creed Odyssey and Red Dead Redemption 2 in 2018
Meteor showers as a service will be visible for about 100 kilometres in all directions
Saturn's rings only formed in the past 100 million years, suggests analysis of Cassini space probe data
New findings contradict conventional belief that Saturn's rings were formed along with the planet about 4.5 billion years ago