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Apple Safari CVE-2026-43725

| EUVDEUVD-2026-40192 HIGH
Improper Input Validation (CWE-20)
2026-06-29 apple GHSA-qxph-q4j6-rfqr
Information Disclosure Apple Ios And Ipados
7.1
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
7.1 HIGH
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
vuln.today AI
7.1 HIGH

Web content is network-delivered (AV:N), low complexity, no auth (PR:N) but needs the victim to open the page (UI:R); the sandbox escape changes scope (S:C) with limited low impact across C/I/A.

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

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

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

Lifecycle Timeline

5
Analysis Generated
Jun 29, 2026 - 22:32 vuln.today
CVSS changed
Jun 29, 2026 - 22:22 NVD
7.1 (HIGH)
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
HIGH 7.1

DescriptionCVE.org

The issue was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious website may be able to process restricted web content outside the sandbox.

AnalysisAI

Sandbox escape in Apple's WebKit browser engine (Safari, iOS/iPadOS, and macOS Tahoe before 26.5.2) lets a malicious website process restricted web content outside the browser sandbox, undermining the isolation that confines untrusted web pages. The flaw stems from improper input validation (CWE-20), was reported by Apple itself, and requires a victim to visit attacker-controlled content (UI:R); CVSS 7.1 reflects limited confidentiality, integrity, and availability impact across a changed scope. No public exploit identified at time of analysis, and it is not listed in CISA KEV.

Technical ContextAI

The affected component is Apple's WebKit rendering engine, which powers Safari on macOS and is the mandated browser engine on iOS and iPadOS, so the same defect surfaces across all three platforms (CPEs apple:safari, apple:ios_and_ipados, apple:macos). WebKit confines untrusted web content inside a sandboxed WebContent process so that even malicious JavaScript/HTML cannot reach the broader OS or other origins. The root cause is CWE-20 (Improper Input Validation): WebKit failed to properly validate certain input, allowing 'restricted web content' to be processed outside the intended sandbox boundary. This maps to the CVSS scope change (S:C) - the vulnerable sandboxed renderer affects resources beyond its security authority. Apple's fix note ('addressed with improved input validation') confirms a validation-class root cause rather than a memory-safety/corruption bug.

RemediationAI

Vendor-released patch: update to Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2, which Apple states fixes the issue via improved input validation; apply via Settings/Software Update or the App Store per Apple advisories https://support.apple.com/en-us/127594, https://support.apple.com/en-us/127595, and https://support.apple.com/en-us/127685. Because exploitation requires the victim to load malicious web content, interim compensating controls until patching include enabling Lockdown Mode on iOS/iPadOS/macOS, which aggressively restricts WebKit content handling at the cost of disabling some web features and rich media, and using web/DNS filtering to block known-malicious domains, which adds latency and can cause false positives. There is no feature toggle specific to this flaw, so prompt patching is the only complete fix.

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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-2026-43725 vulnerability details – vuln.today
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