CSP bypass via AudioWorklet enforcement failure
Published Aug 25, 2026 · Updated Aug 25, 2026
Content Security Policy bypass in Apple WebKit on affected Safari, iOS, iPadOS, and macOS releases allows remote attackers to evade CSP. The flaw leaves Content Security Policy insufficiently enforced in AudioWorklet contexts when WebKit processes attacker-controlled content. Reachability requires a user to process malicious web content; Apple has not disclosed the faulty enforcement logic or effects beyond bypassing the page policy.
Summary
What happened
Content Security Policy bypass in Apple WebKit on affected Safari, iOS, iPadOS, and macOS releases allows remote attackers to evade CSP. The flaw leaves Content Security Policy insufficiently enforced in AudioWorklet contexts when WebKit processes attacker-controlled content. Reachability requires a user to process malicious web content; Apple has not disclosed the faulty enforcement logic or effects beyond bypassing the page policy.
The record
- CVE
- CVE-2026-43670
- Published
- Aug 25, 2026
- Updated
- Aug 25, 2026
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-693
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 25, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <18.7.9
- Affected versionversion=0 <26.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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