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Apple Safari CVE-2026-43713

| EUVDEUVD-2026-40196 MEDIUM
Hardware Logic with Insecure De-Synchronization between Control and Data Channels (CWE-1264)
2026-06-29 apple GHSA-29hx-mf8v-qr9g
Apple Information Disclosure Ios And Ipados
6.5
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

Network-delivered via webpage visit (AV:N, UI:R); no auth needed; impact is confidentiality-only data leak with no scope change.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

5
Analysis Generated
Jun 30, 2026 - 15:26 vuln.today
CVSS changed
Jun 30, 2026 - 15:22 NVD
6.5 (MEDIUM)
Patch available
Jun 29, 2026 - 22:02 EUVD
CVE Published
Jun 29, 2026 - 19:42 cve.org
UNKNOWN (no severity yet)
CVE Published
Jun 29, 2026 - 19:42 cve.org
MEDIUM 6.5

DescriptionCVE.org

A permissions issue was addressed with additional restrictions. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Visiting a website may leak sensitive data.

AnalysisAI

Sensitive data leakage in Apple Safari, iOS/iPadOS, and macOS Tahoe before version 26.5.2 exposes users to cross-site data disclosure when visiting a malicious or compromised website. The root cause is a permissions enforcement deficiency (CWE-1264) that allows a web context to access data beyond its intended permission boundary. No active exploitation has been confirmed by CISA KEV, and the EPSS score of 0.17% (6th percentile) indicates low observed exploitation probability at time of analysis; however, the unauthenticated, low-complexity network vector makes this a realistic target for drive-by attacks once details become public.

Technical ContextAI

CWE-1264 describes a class of vulnerabilities where access control mechanisms fail to enforce intended separation between data channels or permission scopes. In the context of a web browser like Safari, this typically manifests as a flaw in how the engine enforces same-origin policy, storage partitioning, or Web API permission gating - allowing one browsing context to read sensitive data that should be restricted to another origin or application boundary. Affected products confirmed via CPE strings include Apple Safari (all versions prior to 26.5.2), Apple iOS and iPadOS (all versions prior to 26.5.2), and Apple macOS Tahoe (all versions prior to 26.5.2). Apple's advisory language - 'additional restrictions' - is consistent with a tightening of permission checks in WebKit, the shared rendering engine underlying all three platforms.

RemediationAI

The primary fix is to upgrade to the vendor-released patched versions: Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, and macOS Tahoe 26.5.2, all available through standard Apple software update channels. Vendor advisories at https://support.apple.com/en-us/127594 (Safari), https://support.apple.com/en-us/127595 (iOS/iPadOS), and https://support.apple.com/en-us/127685 (macOS) provide official patch details. As a compensating control prior to patching, users can avoid browsing untrusted websites and consider enabling Safari's built-in 'Fraudulent Website Warning' and content blockers to reduce attack surface, though these do not eliminate the underlying permissions flaw. Enterprises managing Apple device fleets via MDM should prioritize enforcing the OS and browser update via policy, as iOS and iPadOS do not allow third-party browser engines, meaning all browsers on those platforms share the vulnerable WebKit.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected

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CVE-2026-43713 vulnerability details – vuln.today
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