AppleCVE-2026-28900

Apple macOS: authentication bypass by spoofing

Medium5.5CVE-2026-28900 · Published Jul 27, 2026 · updated Aug 25, 2026

A file quarantine bypass was addressed with additional checks. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5. A maliciously crafted ZIP archive may bypass Gatekeeper checks.

Apple advisory

Affected versions

Package	Affected	Fixed in
macOS Product	< 14.8.8	14.8.8
	< 15.7.8	15.7.8
	< 26.5	26.5

Details and references

CVSS 3.1: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Severity from: CISA (its enrichment of the CVE record)
Weakness: CWE-290, CWE-693

More Apple advisories

All Apple

Date	Advisory	Severity	Fixed in
Jul 27	Apple iOS and iPadOS: out-of-bounds write Critical9.8Jul 27 CVE-2026-6476918.7.10+3 more	Critical9.8	18.7.10+3 more
Jul 27	Apple iOS and iPadOS: out-of-bounds write Critical9.8Jul 27 CVE-2026-6477018.7.10+3 more	Critical9.8	18.7.10+3 more
Jul 27	Apple iOS and iPadOS: buffer overflow Critical9.8Jul 27 CVE-2026-6477118.7.10+2 more	Critical9.8	18.7.10+2 more
Jul 27	Apple iOS and iPadOS: out-of-bounds write Critical9.8Jul 27 CVE-2026-6477218.7.10+2 more	Critical9.8	18.7.10+2 more
Jul 27	Apple iOS and iPadOS: integer overflow Critical9.8Jul 27 CVE-2026-6477418.7.10+3 more	Critical9.8	18.7.10+3 more
Jul 27	A memory initialization issue was addressed with improved memory handling Critical9.8Jul 27 CVE-2026-6477526.6+2 more	Critical9.8	26.6+2 more

Affected versions

More Apple advisories

Critical advisories by email