Safari: Access of Resource Using Incompatible Type
CVE-2026-86974 is a high-severity access of resource using incompatible type vulnerability in Safari from Apple, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 27.2 as the first without the flaw, so updating Safari to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.53% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Safari to 27.2 or a later version.
- Update iOS and iPadOS to 26.7.2 or 27.2, whichever matches your release line, or a later version.
- Update macOS to 27.2 or a later version.
- Read the advisory on support.apple.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Apple | Safari | before 27.2 | 27.2 |
| Apple | iOS and iPadOS | before 26.7.2; before 27.2 | 26.7.2, 27.2 |
| Apple | macOS | before 27.2 | 27.2 |
| Apple | visionOS | before 27.2 | 27.2 |
| Apple | iPadOS | before 26.7.2; 27.0 up to, but not including, 27.2 | 26.7.2, 27.2 |
| Apple | Iphone OS | before 26.7.2; 27.0 up to, but not including, 27.2 | 26.7.2, 27.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by CISA (ADP).
Official description
A type confusion issue was addressed with improved checks. This issue is fixed in Safari 27.2, iOS 26.7.2 and iPadOS 26.7.2, iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, visionOS 27.2. Processing maliciously crafted web content may lead to memory corruption.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Resource Using Incompatible Type
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
More Access of Resource Using Incompatible Type vulnerabilities (CWE-843)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- support.apple.com/en-us/149227Release Notes
- support.apple.com/en-us/149230Release Notes
- support.apple.com/en-us/149521Release Notes
- support.apple.com/en-us/149526Release Notes
- support.apple.com/en-us/149527Release Notes
Other vulnerabilities in Safari
- 7.5 High severity
- 8.8 High severity
- 10.0 Critical severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
Recent Access of Resource Using Incompatible Type vulnerabilities
- 9.6 Critical severity
- 7.5 High severity
- 9.6 Critical severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
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