What Safari 17.3 Fixes
Safari 17.3, released January 22, 2024, fixes 5 vulnerabilities in 2 parts of the system, according to Apple's security advisory.
Apple says one of these flaws — CVE-2024-23222 — may already have been exploited. That makes Safari 17.3 an update to install now rather than at the weekend.
It has since been superseded: the newest security release for Safari is Safari 27.2, from October 26, 2026, which includes these fixes.
| What an attacker could do | Fixes |
|---|---|
| Run code | 2 |
| Private data or protections bypassed | 1 |
| Spoofing | 1 |
| Other | 1 |
Grouped by us from the impact Apple gives for each fix; the impact lines below are Apple's own.
Exploited Before the Fix
Apple flags a fix as possibly exploited when it has a credible report that the flaw was used against real people before the patch. This one is the reason to update today.
-
WebKit Exploited
Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited.
A type confusion issue was addressed with improved checks.
CVE-2024-23222
Which Devices Get Safari 17.3
Apple lists Safari 17.3 for: macOS Monterey and macOS Ventura.
How to Install Safari 17.3
Safari updates arrive through Software Update on the Mac. On a current macOS they are part of the macOS update; on older versions they are offered separately.
Security fixes are cumulative: any later release for the same version includes these as well, so if you are already past Safari 17.3 there is nothing to do.
Every Fix in Safari 17.3
The rest of Apple's advisory — every fix not already listed above, the most serious kinds first. Each entry is the part of the system affected, Apple's description of the impact and the fix, and the CVE ID.
-
WebKit
Processing web content may lead to arbitrary code execution
The issue was addressed with improved memory handling.
CVE-2024-23213 -
Safari
A user's private browsing activity may be visible in Settings
A privacy issue was addressed with improved handling of user preferences.
CVE-2024-23211 -
WebKit
A malicious website may cause unexpected cross-origin behavior
A logic issue was addressed with improved checks.
CVE-2024-23271 -
WebKit
A maliciously crafted webpage may be able to fingerprint the user
An access issue was addressed with improved access restrictions.
CVE-2024-23206
Safari Security Release History
Safari 17.3 in context: the security releases Apple has published for Safari, newest first, with the number of fixes each carried.
| Release | Released | Fixes |
|---|---|---|
| Safari 18 | September 16, 2024 | 7 |
| Safari 17.6 | July 29, 2024 | 12 |
| Safari 17.5 | May 13, 2024 | 10 |
| Safari 17.4.1 | March 25, 2024 | 1 |
| Safari 17.4 | March 7, 2024 | 6 |
| Safari 17.3 | January 22, 2024 | 5 Exploited |
The Same Fixes Elsewhere
Apple ships most fixes to every platform that shares the code, and to older versions still under support. These releases close at least one of the same CVEs:
Frequently Asked Questions
What does Safari 17.3 fix?
5 security vulnerabilities in 2 parts of the system, from Apple's advisory of January 22, 2024. 2 could have let an attacker run code.
Was anything fixed in Safari 17.3 exploited?
Yes. Apple says CVE-2024-23222 may have been exploited before the fix. Install it now.
Which devices can install Safari 17.3?
macOS Monterey and macOS Ventura.
Is Safari 17.3 the latest security update?
No. Safari 27.2, from October 26, 2026, is newer and includes these fixes.
Source: About the security content of Safari 17.3, Apple. Rechecked automatically while Apple is still adding entries.