RCE vulnerability in a widely used desktop OS (macOS) with high CVSS; can enable full compromise of corporate endpoints—important for all IT/endpoint teams.
CVE-2026-86929
Out-of-bounds write in macOS allows arbitrary code execution from crafted files.
Is CVE-2026-86929 being exploited?
Not confirmed. CVE-2026-86929 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-86929?
CVE-2026-86929 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-86929?
Yes. A fix has been recorded for CVE-2026-86929. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-86929 affect?
CVE-2026-86929 affects macOS Golden Gate (prior to 27), macOS Sequoia (prior to 15.8.2), macOS Tahoe (prior to 26.7.2). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-86929?
Install the macOS updates (Golden Gate 27 / Sequoia 15.8.2 / Tahoe 26.7.2) immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Arbitrary code execution when a malicious file is processed; attacker can execute code and fully compromise affected macOS hosts.
Immediate action required
- affected< 15.8.2
- affected< 26.7.2
- affected< 27
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.