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Apple Safari CVE-2026-64728

| EUVDEUVD-2026-49488 MEDIUM
Protection Mechanism Failure (CWE-693)
2026-07-27 apple GHSA-wggh-79p8-xw25
Information Disclosure Apple Red Hat Tvos Visionos Watchos Ios And Ipados Suse
6.5
CVSS 3.1 · Vendor: apple
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Send malicious link to user
  2. Delivery
    User visits page
  3. Exploit
    User interacts with iframe content
  4. Execution
    Bypass iframe sandbox
  5. Impact
    Violate integrity policy of parent page

Vulnerability Assessment

Weakness
CWE
CWE-693
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V15 - Secure Coding and Architecture Protection mechanism completeness
Exploitation Conditions

User interaction required (UI:R from CVSS): the victim must click a link, view a crafted web page, or interact with specific content such as triggering a popup or submitting data. No other special preconditions - the vulnerability can be triggered against default configurations of Safari and all listed Apple platforms below 26.6. The attack does not require authentication or special user privileges.
Impact

CVSS 6.5 (Medium) indicates a significant integrity impact combined with low attack complexity and network vector, but this is moderated by the requirement for user interaction (UI:R). The EPSS score of 0.14% (percentile 4%) suggests a very low probability of exploitation in the wild, and there is no entry in CISA KEV or indication of active exploitation. The SSVC decision framework would classify this as 'exploitation unconfirmed', 'automatable' potentially (via automated phishing), but 'public well-being impact' is limited. Overall, this is a low-priority issue for patching - defenders should apply the update during normal cycles, but it does not warrant emergency patching. Data is consistent across sources.
Exploit ScenarioDerived

An attacker crafts a website containing malicious JavaScript embedded in an iframe sandbox. The user, while browsing with Safari 26.5 or older, visits the site and interacts with the page (e.g., clicks a link or submits a form). The vulnerability allows the attacker to break out of the iframe sandbox and modify content or perform actions that violate the sandbox policy, such as reading cookies or redirecting the parent page. No public exploit code is known at this time.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 28, 2026

Bypass of iframe sandboxing policy in Apple Safari and all Apple operating systems through version 26.5 allows malicious web content to violate sandbox restrictions. Affected users include anyone running Safari on iOS, iPadOS, macOS Tahoe, tvOS, visionOS, or watchOS prior to version 26.6. An attacker can cause integrity violations, such as injecting or modifying content within sandboxed iframes, but requires user interaction (clicking a link or visiting a malicious page) and no public exploit or active exploitation has been identified at this time.

RemediationAI

Apply the vendor-released patch by updating all affected Apple devices to version 26.6. For Safari standalone, update to Safari 26.6; for iOS/iPadOS, macOS Tahoe, tvOS, visionOS, watchOS, apply the respective OS update to 26.6. Advisory URLs: https://support.apple.com/en-us/128066 and related. No workarounds are available; the only mitigation is updating. Compensating controls such as blocking WebKit-based browsers or disabling JavaScript are impractical for most environments.

Affected VersionsENISA

watchOS 0 <26.6
visionOS 0 <26.6
iOS and iPadOS 0 <26.6
macOS 0 <26.6
tvOS 0 <26.6
Safari 0 <26.6

Affected Packages

euvd ios_and_ipados fix: 26.6
euvd macos fix: 26.6
euvd safari fix: 26.6
euvd tvos fix: 26.6
euvd visionos fix: 26.6
euvd watchos fix: 26.6

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 6 packages in euvd

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Technical ContextAI · show details

The vulnerability lies in Apple's WebKit rendering engine, which implements iframe sandboxing to enforce security policies such as blocking form submission, script execution, or navigation from sandboxed contexts. CWE-693 (Protection Mechanism Failure) describes the root cause: the permission validation logic is flawed, allowing a maliciously crafted webpage to bypass the sandbox restrictions. CPE data confirms all Apple platforms running versions below 26.6 are affected, including Safari separate from OS upgrades. The attack vector is network-based (user visits a site), requires no authentication, but relies on user interaction.

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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:H/A:N
vuln.today AI 6.5 MEDIUM

User interaction required, scope unchanged, no confidentiality impact.

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

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
High
Availability
None

Lifecycle Timeline

4
CVSS changed
Jul 28, 2026 - 16:22 NVD
6.5 (MEDIUM)
Patch available
Jul 27, 2026 - 21:17 EUVD
CVE Published
Jul 27, 2026 - 20:12 cve.org
MEDIUM 6.5
CVE Published
Jul 27, 2026 - 20:12 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

A permissions issue was addressed with improved validation. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Maliciously crafted web content may violate iframe sandboxing policy.

Threat Intelligence Overview

EPSS Score
0.1%
Top 96% exploitable
Prevalence
High
Apple devices widely deployed across individuals and enterprises
Data Quality
5 sources
Confidence: Medium
EUVD NVD CVE.org EPSS Vulnrichment Vendor VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
High
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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Same weakness CWE-693 – Protection Mechanism Failure

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 Affected

References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-64728 ADVISORY https://seclists.org/oss-sec/2026/q3/521 ADVISORY https://vuldb.com/vuln/383711 REF https://support.apple.com/en-us/128066 REF https://support.apple.com/en-us/128067 REF https://support.apple.com/en-us/128068 REF https://support.apple.com/en-us/128069 REF https://support.apple.com/en-us/128070 REF https://support.apple.com/en-us/128073

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