CVE-2026-43670 Apple CVE debrief

Who should care

Organizations and individuals using Apple products, particularly those with high-risk web content processing, should prioritize patching and monitoring. This includes administrators of Safari, iOS, iPadOS, and macOS deployments, as well as security teams responsible for vulnerability management and web application security. Ensuring timely updates and implementing Content Security Policy can help mitigate potential risks associated with this vulnerability.

Technical summary

A Content Security Policy bypass vulnerability was addressed with improved enforcement in AudioWorklet contexts. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5. Processing maliciously crafted web content may bypass Content Security Policy. The vulnerability affects web content processing in AudioWorklet contexts, which could lead to unauthorized access or modification of sensitive information.

Defensive priority

High-priority defensive review recommended due to high CVSS score of 8.8 and potential impact on web content processing.

Recommended defensive actions

• Review and apply patches for Safari, iOS, iPadOS, and macOS as per vendor advisories.
• Implement Content Security Policy to restrict web content processing.
• Monitor web applications for potential malicious content.
• Conduct inventory checks for affected Apple products and ensure updates are applied.
• Verify patch deployment in managed environments.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

Evidence from official CVE Program record and NIST NVD detail page indicates a Content Security Policy bypass vulnerability in AudioWorklet contexts, fixed in various Apple products. Limited details on affected scope and potential exploitation. Further review of vendor advisories and product documentation is recommended to understand the full impact and ensure proper patching.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.