CVE-2026-43821
Apple Operating Systems Sandbox Escape Vulnerability
Description
An access issue was addressed with improved access restrictions. 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. An app may be able to read files outside of its sandbox.
INFO
Published Date :
July 27, 2026, 9:17 p.m.
Last Modified :
July 29, 2026, 7:56 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-43821
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Safari to version 26.6.
- Update iOS and iPadOS to version 26.6.
- Update macOS Tahoe to version 26.6.
- Update tvOS, visionOS, and watchOS to version 26.6.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43821.
| URL | Resource |
|---|---|
| https://support.apple.com/en-us/128066 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/128067 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/128068 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/128069 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/128070 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/128073 | Release Notes Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43821 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43821
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43821 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43821 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 29, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.6 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 26.6 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 26.6 *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 26.6 *cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* versions up to (excluding) 26.6 *cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* versions up to (excluding) 26.6 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 26.6 Added Reference Type Apple Inc.: https://support.apple.com/en-us/128066 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/128067 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/128068 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/128069 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/128070 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/128073 Types: Release Notes, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Added CWE CWE-284 Added SSVC {'id': 'CVE-2026-43821', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-28T19:12:12.305452Z'} -
New CVE Received by [email protected]
Jul. 27, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Apple', 'product': 'Safari', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.6', 'versionType': 'custom'}]}, {'vendor': 'Apple', 'product': 'iOS and iPadOS', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.6', 'versionType': 'custom'}]}, {'vendor': 'Apple', 'product': 'macOS', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.6', 'versionType': 'custom'}]}, {'vendor': 'Apple', 'product': 'tvOS', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.6', 'versionType': 'custom'}]}, {'vendor': 'Apple', 'product': 'visionOS', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.6', 'versionType': 'custom'}]}, {'vendor': 'Apple', 'product': 'watchOS', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '26.6', 'versionType': 'custom'}]}] Added Description An access issue was addressed with improved access restrictions. 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. An app may be able to read files outside of its sandbox. Added Reference https://support.apple.com/en-us/128066 Added Reference https://support.apple.com/en-us/128067 Added Reference https://support.apple.com/en-us/128068 Added Reference https://support.apple.com/en-us/128069 Added Reference https://support.apple.com/en-us/128070 Added Reference https://support.apple.com/en-us/128073