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Apple Safari CVE-2026-43712

| EUVDEUVD-2026-40200 MEDIUM
Out-of-bounds Read (CWE-125)
2026-06-29 apple GHSA-ch2x-vqw2-2h28
Buffer Overflow Information Disclosure Apple 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:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

Network delivery via web content, no authentication, low complexity, but mandatory user interaction; impact confirmed as availability-only (process crash, no data leakage confirmed).

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/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
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jun 29, 2026 - 22:37 vuln.today
CVSS changed
Jun 29, 2026 - 22:22 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

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.

AnalysisAI

Out-of-bounds read in Apple's web content processing engine (WebKit) causes a browser process crash when a user visits a maliciously crafted webpage, affecting Safari, iOS/iPadOS, and macOS Tahoe. All versions prior to the 26.5.2 releases across those platforms are affected, making this a broad-surface denial-of-service vulnerability against Apple's default browser ecosystem. No public exploit code has been identified at time of analysis, and the vulnerability is not listed in CISA KEV; however, the low attack complexity and zero-authentication requirement lower the bar for opportunistic abuse once a malicious page is visited.

Technical ContextAI

CWE-125 (Out-of-bounds Read) describes a condition where a process reads data beyond the allocated memory buffer boundaries. Apple's typical advisory language - 'addressed with improved memory handling' - is consistent with a WebKit parser or renderer component failing to validate memory bounds when processing certain web content constructs (e.g., malformed HTML, JavaScript objects, or media elements). The CPE strings confirm three distinct affected product lines: cpe:2.3:a:apple:safari, cpe:2.3:a:apple:ios_and_ipados, and cpe:2.3:a:apple:macos, all sharing the same underlying WebKit engine. An out-of-bounds read in a rendering or parsing context typically results in a crash (availability loss) and, in some configurations, may leak adjacent memory contents - though the assigned CVSS vector records only availability impact (C:N/I:N/A:H), suggesting the confirmed impact at time of analysis is limited to process termination. The input tags include 'Information Disclosure,' which aligns with the theoretical risk class of CWE-125 but is not corroborated by the CVSS confidentiality metric.

RemediationAI

Vendor-released patch: Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2 - all released by Apple and documented at https://support.apple.com/en-us/127594, https://support.apple.com/en-us/127595, and https://support.apple.com/en-us/127685. Users should apply the relevant system update or Safari update immediately via Software Update on macOS or Settings > General > Software Update on iOS/iPadOS. For organizations managing device fleets, deploy the update via MDM as a priority. No effective workaround exists for disabling web content processing in Safari without disabling browser functionality entirely; if patching is infeasible in the short term, restricting Safari usage in favor of a non-WebKit browser on macOS (e.g., Firefox, Chrome) can reduce exposure, though this trade-off affects user workflow and does not protect the iOS/iPadOS attack surface, where all browsers use WebKit by platform mandate.

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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-2026-43712 vulnerability details – vuln.today
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