VulnerabilityPublished 25 Mar 2026Updated 21 Aug 2026

CVE-2026-20670: Apple macOS · An app may be able to access sensitive user data

Affects Apple macOSSource CVE Database V5

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Not known to be exploited · CVSS 5.5 Medium · fixed in 26.3 : update Apple macOS when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

5.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 26.3, 15.7.4, 14.8.4

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-6hg7-v5xr-46g2

What to do

Upgrade Apple macOS to 26.3, 15.7.4 or 14.8.4.

Affected software

Product	Affected	Fixed in
ApplemacOS	Affected <26.3	Fixed in 26.3
ApplemacOS	Affected <15.7.4	Fixed in 15.7.4
ApplemacOS	Affected <14.8.4	Fixed in 14.8.4

AI-suggested

To mitigate CVE-2026-20670, organizations should prioritize applying the official patches released by Apple for macOS Sonoma 14.8.4 and macOS Tahoe 26.3 as soon as possible. Beyond patching, organizations should implement strict endpoint security controls to limit local access to trusted users and processes only. Employing application whitelisting and monitoring for unusual app behavior can help detect attempts to exploit authorization flaws. Regularly auditing user privileges and restricting unnecessary local privileges reduces the risk of exploitation. Additionally, enabling macOS security features such as System Integrity Protection (SIP) and Endpoint Security Framework can provide layered defenses. Organizations should also educate users about the risks of installing untrusted applications and maintain up-to-date antivirus and endpoint detection and response (EDR) solutions to identify suspicious activities. Finally, monitoring logs for unauthorized access attempts and anomalous data access patterns can aid in early detection of exploitation attempts.

Description

An authorization issue was addressed with improved state management. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An app may be able to access sensitive user data.

Impact

The primary impact of CVE-2026-20670 is unauthorized access to sensitive user data, which can lead to confidentiality breaches. Since the vulnerability allows an app with limited privileges to bypass authorization controls, attackers who gain local access to a system could exploit this flaw to extract personal or corporate data without detection. This could compromise user privacy, intellectual property, or sensitive organizational information. Although the vulnerability does not affect data integrity or system availability, the confidentiality breach alone can have severe consequences, including regulatory non-compliance, reputational damage, and potential financial losses. Organizations with macOS endpoints, especially those handling sensitive or regulated data, are at risk. The requirement for local access and low privileges reduces the attack surface but does not eliminate risk, particularly in environments where endpoint security is weak or insider threats exist. The lack of user interaction requirement facilitates stealthy exploitation once local access is obtained.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Apr 2026, 02:58 UTC

Technical details

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