What is the CVSS score of CVE-2026-28900?

CVE-2026-28900 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.1%.

Is there a patch available for CVE-2026-28900?

Yes, a patch is available for CVE-2026-28900. Update the affected software to the latest version immediately.

Apple CVE-2026-28900

EUVD-2026-49445 MEDIUM

Authentication Bypass by Spoofing (CWE-290)

2026-07-27 apple

GHSA-79fp-6cmr-w263

Authentication Bypass Apple

5.5

CVSS 3.1 · Vendor: apple

Severity by source

Vendor (apple) PRIMARY

5.5 MEDIUM

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

Primary rating from Vendor (apple) · only source for this CVE.

CVSS VectorVendor: apple

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Jul 28, 2026 - 16:35 vuln.today

CVSS changed

Jul 28, 2026 - 16:22 NVD

5.5 (MEDIUM)

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:14 cve.org

MEDIUM 5.5

CVE Published

Jul 27, 2026 - 20:14 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

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

AnalysisAI

A file quarantine bypass in macOS Gatekeeper allows maliciously crafted ZIP archives to evade security checks. Affected versions include macOS Sequoia before 15.7.8 and macOS Sonoma before 14.8.8. Exploitation is not confirmed in the wild, public exploit code has not been identified, and EPSS indicates very low likelihood of widespread attacks.