CVE-2026-20665
Content Security Policy Bypass in Safari and Apple OS Web Engines
Publication date: 2026-03-25
Last updated on: 2026-03-25
Assigner: Apple Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apple | ipados | to 18.7.7 (exc) |
| apple | ipados | From 26.0 (inc) to 26.4 (exc) |
| apple | iphone_os | to 18.7.7 (exc) |
| apple | iphone_os | From 26.0 (inc) to 26.4 (exc) |
| apple | tvos | to 26.4 (exc) |
| apple | visionos | to 26.4 (exc) |
| apple | watchos | to 26.4 (exc) |
| apple | macos | to 26.4 (exc) |
| apple | safari | to 26.4 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-693 | The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves a flaw in state management that affects how certain Apple operating systems and Safari process web content. Specifically, when maliciously crafted web content is processed, it may prevent the enforcement of the Content Security Policy (CSP). CSP is a security feature designed to restrict resources that web pages can load, helping to prevent attacks such as cross-site scripting (XSS).
How can this vulnerability impact me? :
If exploited, this vulnerability could allow attackers to bypass Content Security Policy protections, potentially enabling them to execute malicious scripts or load unauthorized resources in affected Apple devices and browsers. This could lead to security risks such as data theft, session hijacking, or other malicious activities when browsing the web.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update affected Apple products to the fixed versions: Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, and watchOS 26.4.