CVE-2024-23271: Apple Safari · A malicious website may cause unexpected cross-origin behavior
Affects Apple SafariSource CVE Database V5
Not known to be exploited · CVSS 7.3 High.
Data as of 26 Oct 2026, 15:59 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LExploitation evidence
Disclosed: evidence found.
CVE published 24 Apr 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apple Safari | Affected
| Fixed in– |
AI-suggested
Apple has released official fixes for this vulnerability in Safari 17.3 and the corresponding OS updates (iOS 17.3, iPadOS 17.3, macOS Sonoma 14.3, tvOS 17.3, watchOS 10.3). Users and administrators should apply these updates promptly to remediate the issue. No additional mitigations are required beyond installing the official patches.
Description
CVE-2024-23271 is a high-severity vulnerability in Apple Safari that involves a logic issue causing unexpected cross-origin behavior. This flaw could allow a malicious website to bypass normal cross-origin restrictions, potentially exposing user data or browser state in unintended ways. Apple addressed this issue with improved checks in Safari 17.3 and corresponding updates to iOS, iPadOS, macOS Sonoma, tvOS, and watchOS. The vulnerability has a CVSS score of 7.3, indicating significant impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time. The vendor advisory confirms the issue is fixed in the specified software versions, and users should update to these versions to mitigate the risk.
References
- support.apple.com/en-us/120304 (opens in a new tab)
- support.apple.com/en-us/120306 (opens in a new tab)
- support.apple.com/en-us/120309 (opens in a new tab)
- support.apple.com/en-us/120311 (opens in a new tab)
- support.apple.com/en-us/120339 (opens in a new tab)
- support.apple.com/en-us/HT214059 (opens in a new tab)
- support.apple.com/en-us/HT214055 (opens in a new tab)
- support.apple.com/en-us/HT214056 (opens in a new tab)
- support.apple.com/en-us/HT214060 (opens in a new tab)
- support.apple.com/en-us/HT214061 (opens in a new tab)
- support.apple.com/kb/HT214060 (opens in a new tab)
- support.apple.com/kb/HT214059 (opens in a new tab)
- support.apple.com/kb/HT214061 (opens in a new tab)
- support.apple.com/kb/HT214055 (opens in a new tab)
- support.apple.com/kb/HT214056 (opens in a new tab)