CVE-2026-20652 in Safari
Summary
by MITRE • 02/12/2026
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. A remote attacker may be able to cause a denial-of-service.
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Analysis
by VulDB Data Team • 07/01/2026
This vulnerability represents a memory handling issue that affects multiple Apple operating systems including macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, and Safari 26.3. The flaw manifests as a potential denial-of-service condition that can be exploited by remote attackers without requiring any user interaction or authentication. The vulnerability was addressed through enhanced memory management mechanisms within the affected software components. From a cybersecurity perspective, this issue falls under the category of memory corruption vulnerabilities that can lead to system instability and service disruption. The fix implemented by Apple demonstrates the organization's commitment to maintaining system integrity and preventing exploitation of memory handling flaws that could compromise system availability. This type of vulnerability is particularly concerning in enterprise environments where continuous system availability is critical for business operations and user productivity.
The technical nature of this vulnerability indicates improper memory allocation or deallocation processes within the affected Apple operating systems and browsers. Memory handling issues of this nature typically arise from inadequate bounds checking, improper pointer management, or insufficient memory validation routines. Attackers can potentially craft malicious inputs or network traffic that triggers the memory corruption, leading to system crashes or application failures. This vulnerability aligns with common weakness enumerations such as CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions. The remediation approach taken by Apple focuses on strengthening memory management protocols, which suggests the vulnerability was likely exploitable through carefully crafted input that could cause memory corruption during normal system operations. The fact that the fix is implemented across multiple platforms including mobile and desktop operating systems indicates a widespread memory handling pattern that required coordinated remediation efforts.
The operational impact of this vulnerability extends beyond simple system crashes to encompass broader service availability concerns that could affect enterprise networks and user productivity. Remote exploitation capabilities mean that attackers can potentially target systems without physical access or user interaction, making this vulnerability particularly dangerous in environments with exposed network services. Organizations running affected versions of Apple operating systems face increased risk of service disruption, especially in mission-critical applications where system stability is paramount. The vulnerability's potential for denial-of-service impacts could affect various network services and applications that depend on Apple devices for connectivity or functionality. From an attacker's perspective, this vulnerability provides a low-effort method for causing system instability, which could be used for harassment, competitive disruption, or as part of larger attack campaigns. The vulnerability's remediation through system updates requires organizations to maintain updated software versions, highlighting the importance of proper patch management in cybersecurity defense strategies.
Security professionals should prioritize the deployment of the latest Apple security updates across all affected systems to mitigate this vulnerability. The remediation process requires careful planning to ensure that updates do not introduce compatibility issues with existing enterprise applications or services. Organizations should implement network monitoring to detect potential exploitation attempts targeting this vulnerability, particularly in environments where Apple devices are exposed to untrusted networks. The vulnerability's classification as a remote denial-of-service issue means that traditional network segmentation approaches may not fully protect against exploitation, requiring more comprehensive security controls. Implementation of the security patches should be prioritized in accordance with risk assessment protocols, with particular attention to systems that handle sensitive data or provide critical services. The fix addresses a fundamental memory handling issue that could have broader implications for system stability, making it essential for organizations to validate the effectiveness of the patches through proper testing procedures. This vulnerability serves as a reminder of the critical importance of maintaining current security patches across all operating systems and applications to prevent exploitation of memory handling flaws that could compromise system availability and integrity.