CVE-2026-39877 — HIGH (7.8)

Q: What is CVE-2026-39877?

CVE-2026-39877 is a vulnerability with a CVSS score of 7.8 (HIGH). A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8. An app may be able to disclose kernel memory.

Q: How severe is CVE-2026-39877?

CVE-2026-39877 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-39877?

Check the references section above for vendor advisories and patch information. Affected products include: Apple Macos.

Vulnerability Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8. An app may be able to disclose kernel memory.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Apple	Macos	>= 14.0, < 14.8.8

Related Weaknesses (CWE)

CWE-119

References

https://support.apple.com/en-us/128071Release NotesVendor Advisory
https://support.apple.com/en-us/128072Release NotesVendor Advisory

FAQ

What is CVE-2026-39877?

CVE-2026-39877 is a vulnerability with a CVSS score of 7.8 (HIGH). A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8. An app may be able to disclose kernel memory.

How severe is CVE-2026-39877?

CVE-2026-39877 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-39877?

Check the references section above for vendor advisories and patch information. Affected products include: Apple Macos.