High severity · published May 11, 2026
CVE-2026-28954
A file quarantine bypass was addressed with additional checks
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
A file quarantine bypass was addressed with additional checks. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. A maliciously crafted disk image may bypass Gatekeeper checks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 14.8.7; before 15.7.7; before 26.5 · source: vendor, NVD
IO
iOS · Apple
before 18.7.9 · source: NVD
IA
iOS and iPadOS · Apple
before 18.7.9 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28954
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28954
Release Notes
https://support.apple.com/en-us/127111
Release Notes
https://support.apple.com/en-us/127115
Release Notes
https://support.apple.com/en-us/127116
Release Notes
https://support.apple.com/en-us/127117
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