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Apple Safari EUVDEUVD-2026-40193

| CVE-2026-43676 MEDIUM
Out-of-bounds Read (CWE-125)
2026-06-29 apple GHSA-jrqp-jj3r-gr59
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-reachable via crafted web page, no privileges needed, user must visit page (UI:R), crash-only impact maps to A:H with no C or I impact 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 - 22:36 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

An out-of-bounds access issue was addressed with improved bounds checking. 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 Safari crash.

AnalysisAI

Out-of-bounds read in Safari's web content processing engine causes an unexpected application crash when rendering maliciously crafted web content. Affected are Safari prior to 26.5.2, iOS and iPadOS prior to 26.5.2, and macOS Tahoe prior to 26.5.2. An unauthenticated remote attacker (per PR:N/AV:N in the CVSS vector) can trigger a denial-of-service condition by enticing a user to visit a crafted page; no public exploit or CISA KEV listing has been identified at time of analysis.

Technical ContextAI

CWE-125 (Out-of-Bounds Read) describes a root cause where a program reads data from a memory location beyond the allocated buffer boundary. In this case the flaw resides in Apple's web content processing pipeline - the component responsible for parsing and rendering HTML, CSS, JavaScript, and associated media in Safari and the underlying WebKit engine used across iOS and macOS. CPE strings cpe:2.3:a:apple:safari:*, cpe:2.3:a:apple:ios_and_ipados:*, and cpe:2.3:a:apple:macos:* confirm all three Apple platforms are affected. Apple's fix - improved bounds checking - indicates the parser failed to validate memory access boundaries when encountering specially formed web content, allowing reads past the end of an allocated buffer. The tags also reference 'Buffer Overflow,' which aligns loosely with CWE-125; however, the CWE designation is specifically an out-of-bounds read (not a write), making code execution via this path significantly less likely than if it were CWE-122 (heap buffer overflow write).

RemediationAI

Vendor-released patch: Safari 26.5.2, iOS and iPadOS 26.5.2, macOS Tahoe 26.5.2. Update via Apple's standard software update mechanisms (Settings > General > Software Update on iOS/iPadOS; System Settings > General > Software Update on macOS; Help > About Safari on desktop). Advisory references: https://support.apple.com/en-us/127594 (Safari), https://support.apple.com/en-us/127595 (iOS/iPadOS), https://support.apple.com/en-us/127685 (macOS Tahoe). If immediate patching is not possible, a compensating control is to use an alternative browser for untrusted or unknown web content on macOS (note: on iOS/iPadOS this is not effective, as all third-party browsers use the WebKit engine mandated by Apple and would be equally exposed). Content Security Policy enforcement at a gateway or enterprise proxy to block known malicious domains may reduce exposure but cannot substitute for the patch.

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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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EUVD-2026-40193 vulnerability details – vuln.today
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