CVE-2024-40779: Apple Safari · Processing maliciously crafted web content may lead to an unexpected process crash
Affects Apple SafariSource CVE Database V5
Not known to be exploited · CVSS 5.5 Medium · fixed in 17.6 : update Apple Safari when convenient.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 17.6
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 29 Jul 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 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apple Safari | Affected
| Fixed in– |
AI-suggested
To mitigate CVE-2024-40779, organizations and users should promptly apply the security updates released by Apple, including Safari 17.6 and the respective OS updates (iOS 16.7.9/17.6, iPadOS 16.7.9/17.6, macOS Sonoma 14.6, tvOS 17.6, visionOS 1.3, watchOS 10.6). Beyond patching, organizations should implement network-level protections such as web filtering to block access to known malicious websites and employ endpoint security solutions capable of detecting abnormal browser crashes or suspicious web activity. User education is critical to reduce the risk of interacting with untrusted web content. For managed environments, deploying configuration policies that restrict browser extensions and scripts can reduce the attack surface. Monitoring logs for frequent Safari crashes may help identify attempted exploitation. Finally, maintaining an inventory of Apple devices and ensuring they are regularly updated will minimize exposure to this and similar vulnerabilities.
Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Safari 17.6, iOS 16.7.9 and iPadOS 16.7.9, iOS 17.6 and iPadOS 17.6, macOS Sonoma 14.6, tvOS 17.6, visionOS 1.3, watchOS 10.6. Processing maliciously crafted web content may lead to an unexpected process crash.
References
- support.apple.com/en-us/120908 (opens in a new tab)
- support.apple.com/en-us/120909 (opens in a new tab)
- support.apple.com/en-us/120911 (opens in a new tab)
- support.apple.com/en-us/120913 (opens in a new tab)
- support.apple.com/en-us/120914 (opens in a new tab)
- support.apple.com/en-us/120915 (opens in a new tab)
- support.apple.com/en-us/120916 (opens in a new tab)
- support.apple.com/en-us/HT214121 (opens in a new tab)
- support.apple.com/en-us/HT214117 (opens in a new tab)
- support.apple.com/en-us/HT214116 (opens in a new tab)
- support.apple.com/en-us/HT214124 (opens in a new tab)
- support.apple.com/en-us/HT214119 (opens in a new tab)
- support.apple.com/en-us/HT214123 (opens in a new tab)
- support.apple.com/en-us/HT214122 (opens in a new tab)
- seclists.org/fulldisclosure/2024/Jul/16 (opens in a new tab)
- seclists.org/fulldisclosure/2024/Jul/15 (opens in a new tab)
- seclists.org/fulldisclosure/2024/Jul/23 (opens in a new tab)
- seclists.org/fulldisclosure/2024/Jul/21 (opens in a new tab)
- seclists.org/fulldisclosure/2024/Jul/17 (opens in a new tab)
- seclists.org/fulldisclosure/2024/Jul/22 (opens in a new tab)
- seclists.org/fulldisclosure/2024/Jul/18 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2024/09/msg00006.html (opens in a new tab)
- support.apple.com/kb/HT214124 (opens in a new tab)
- support.apple.com/kb/HT214123 (opens in a new tab)
- support.apple.com/kb/HT214122 (opens in a new tab)
- support.apple.com/kb/HT214119 (opens in a new tab)
- support.apple.com/kb/HT214117 (opens in a new tab)
- support.apple.com/kb/HT214116 (opens in a new tab)