Apple Prepares Fix for Safari Bug Allowing Websites to Decipher Your Recent Browsing Activity

Over the weekend, we reported on a bug in WebKit's implementation of a JavaScript API called IndexedDB that can reveal your recent browsing history and even your identity, according to browser fingerprinting service FingerprintJS.

safari icon blue banner
Apple has since prepared a fix for the bug, according to a WebKit commit on GitHub, but the fix will not be available to users until Apple releases macOS Monterey, iOS 15, and iPadOS 15 updates with an updated version of Safari. Apple declined to comment when asked to provide a timeframe for a fix being released to the public.

The bug allows any website that uses IndexedDB for client-side data storage to access the names of IndexedDB databases generated by other websites during a user's browsing session. The bug could allow one website to track other websites the user visits in different tabs or windows, as the database names are often specific to each website, and sometimes the database names contain user-specific identifiers that could reveal a user's identity.

FingerprintJS has a live demo of the bug, which affects newer versions of browsers using Apple's open source browser engine WebKit, including Safari 15 for macOS and Safari on all versions of iOS 15 and iPadOS 15. The bug also affects third-party browsers like Chrome and Edge on iOS 15 and iPadOS 15, as Apple requires all iPhone and iPad browsers to use WebKit.

The bug does not affect Safari 14 for macOS or any browser on iOS 14 and iPadOS 14, according to FingerprintJS, which has a blog post with more details.

Tag: Safari

Popular Stories

iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Launching Later This Year With These 10 New Features

Sunday March 23, 2025 10:00 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
macbook pro blue green

When Will Apple Release the M5 MacBook Pro?

Wednesday March 26, 2025 4:53 pm PDT by
Apple regularly refreshes the MacBook Pro models, and a new version that uses M5 series chips is in the works. Apple just finished refreshing most of the Mac lineup with M4 chips, and now it's time for the M5. Rumors suggest that we could see the first M5 MacBook Pro models this fall. Design There have been no rumors of a design update for the M5 MacBook Pro models that are coming this...
Apple Lumon Terminal Pro

Apple's Mac Site Features Fictional 'Lumon Terminal Pro'

Wednesday March 26, 2025 12:19 pm PDT by
Apple is going all out with promotions for the popular Severance Apple TV+ show today, and as of right now, you'll find a new "Lumon Terminal Pro" listed on Apple's Mac site. The Lumon Terminal Pro is designed to look similar to the machines that Severance employees like Mark S. and Helly R. use for macrodata refinement. The Terminal features a blue keyboard, a small display with wide...
Facebook Feature

Facebook's New iPhone App Feature Turns the Clock Back to 2007

Thursday March 27, 2025 1:59 pm PDT by
In the mid-to-late 2000s, Facebook was all about staying connected with friends and family. However, as the social media platform added new features and grew over time, that core experience began to get drowned out. That changes starting now, according to Meta, which today introduced a new feature that will "bring back the joy" of classic Facebook. Specifically, Meta has redesigned the...
Generic iOS 18

iOS 18.4 Coming Soon With These New Features for Your iPhone

Tuesday March 25, 2025 6:45 am PDT by
Apple is expected to release iOS 18.4 to the general public as soon as next week, following more than a month of beta testing. Apple's website says some iOS 18.4 features will be released in "early April," so the update should be out as early as Tuesday, April 1. Apple this week seeded the iOS 18.4 Release Candidate, which is typically the final beta version, barring the discovery of any...
iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Supports 8K Video Recording, Suggests Leaker [Updated]

Wednesday March 26, 2025 4:06 am PDT by
Update 7:25 pm: Based on comments from our forums, it appears the original Weibo post may have been mistranslated and "8K" actually refers to the high price of the device rather than 8K video recording capabilities. The iPhone 16 Pro currently starts at 7,999 yuan in China. Our original article follows below. Apple's forthcoming iPhone 17 Pro models are capable of shooting 8K video, up...
Foldable iPhone 2023 Feature 1

'iPhone Fold' to Feature Metallic Glass Hinge That Resists Deformation

Thursday March 27, 2025 4:21 am PDT by
Last week, we covered a report claiming that Apple's book-style foldable iPhone (or "iPhone Fold," as we are provisionally calling it here) will use liquid metal hinges to improve durability and help minimize screen creasing. Today, a Chinese leaker provided more details on the properties of this hinge material that help to clarify why Apple chose it for its first foldable device. According...
Generic iOS 19 Feature Mock

Gurman: Jon Prosser's iOS 19 Mockups 'Aren't Representative' of Redesign

Tuesday March 25, 2025 4:47 pm PDT by
The iOS 19 mockup images that leaker Jon Prosser shared today are not representative of the actual iOS 19 design, Bloomberg's Mark Gurman said on social media. According to Gurman, the images that are "floating around" are based on "very old builds" or "vague descriptions," and are lacking key features. Gurman says that we can "expect more from Apple in June." Gurman made the same comment ...
iCloud General Feature Redux

iPhone Users Who Pay for iCloud Storage Receive a New Perk

Thursday March 20, 2025 12:01 am PDT by
If you pay for iCloud storage on your iPhone, Apple has a new perk for you, at no additional cost. The new perk is the ability to create invitations in the Apple Invites app for the iPhone, which launched in the App Store last month. In the Apple Invites app, iCloud+ subscribers can create invitations for any occasion, such as birthday parties, graduations, baby showers, and more. Anyone ...

Top Rated Comments

ouimetnick Avatar
42 months ago

but the fix will not be available to users until Apple releases macOS Monterey, iOS 15, and iPadOS 15 updates with an updated version of Safari.
Why can't we have Safari separated from the OS? I didn't have to update macOS for iTunes updates. Never had to update iOS for updates to Pages, Numbers, Keynote, etc.

They do update Safari separate from macOS on older versions of macOS.. Why can't the same be done with the latest/current release of macOS (and iOS/iPadOS)?
Score: 17 Votes (Like | Disagree)
TheYayAreaLiving ?️ Avatar
42 months ago

What do you mean Apple is preparing for a fix?

Apple just issued a fix for macOS and users can get it right here ('https://www.mozilla.org/en-US/firefox/new/') :p
I’m a big fan of Mozilla, Firefox browser. Been using it for years. Possibly a decade. It's too bad I'm addicted to Safari. But Firefox is my 2nd go-to.

Good suggestion though. ?☝️
Score: 14 Votes (Like | Disagree)
KaliYoni Avatar
42 months ago

The bug does not affect Safari 14 for macOS or any browser on iOS 14 and iPadOS 14
Yet again, upgrading right when a new macOS or iOS is released causes major problems for users! If I could get Tim Cook to do one thing, it would be to stop the forced annual releases of OS's. It's not like Apple would take a sales revenue hit from stretching out releases to 18 or 24 months...
Score: 13 Votes (Like | Disagree)
sw1tcher Avatar
42 months ago
What do you mean Apple is preparing for a fix?

Apple just issued a fix for macOS and users can get it right here ('https://www.mozilla.org/en-US/firefox/new/') :p
Score: 13 Votes (Like | Disagree)
diamondsw Avatar
42 months ago

Why can't we have Safari separated from the OS? I didn't have to update macOS for iTunes updates. Never had to update iOS for updates to Pages, Numbers, Keynote, etc.

They do update Safari separate from macOS on older versions of macOS.. Why can't the same be done with the latest/current release of macOS (and iOS/iPadOS)?
Because Safari is the new IE. I only somewhat kid... Remember when we all blasted Microsoft for this exact behavior in Win98? :(
Score: 13 Votes (Like | Disagree)
ian87w Avatar
42 months ago

Using Firefox while Safari is being repaired is a great idea ?
Not when you are on iOS. Every browsers on iOS use the same Safari/Webkit engine, and are affected by this bug.
Score: 12 Votes (Like | Disagree)