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HIGH severity

CVE-2026-84604 — Apple MACOS

HIGH

CVE-2026-84604 is a high-severity (CVSS 7.8) Out-of-bounds Write vulnerability in apple macos. A fix is available — see the affected versions and patch details below.

A stack buffer overflow was addressed through improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously…

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs15th percentile — riskier than 15% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Description

A stack buffer overflow was addressed through improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted audit file may corrupt process memory.

Affected Products

1 product · 2 configurations
OS
macosapple
≥ 26.0 && < 26.7.2
range

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every apple macos deployment and check each version against the affected-products list above.

  2. Fix

    Apply the apple macos security patch or hotfix for CVE-2026-84604 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

A stack buffer overflow was addressed through improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted audit file may corrupt process memory.
O3 Security · Runtime Protection

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CVE-2026-84604: Apple MACOS (High 7.8)