5.5Medium
Apple Macos
CVE-2026-28899
A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.6, macOS Tahoe 26.7. An app may bypass Gatekeeper checks.
What this means for your business
- It affects Apple Macos. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it only with access to the machine itself, without a login, but only after tricking someone into an action such as opening a file or a link.
- FIRST's prediction model gives it a 0.2% chance of attack attempts being seen in the next 30 days, ranking above 11% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Apple Macos, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 5.5 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N- Weakness
- CWE-693
- Assigned by
- product-security@apple.com
Dates
- Published
- 2026-09-14
- Last modified
- 2026-09-17
- Sources
- NVD
Affected products
- Apple Macos15.0 - 15.8, 26.0 - 26.6
As listed in the NVD configuration data. Not a statement about your estate.