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CVE-2026-28900

MEDIUM 5.5

Published 2026-07-27 · Last modified 2026-07-28

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.1%chance of exploitation in 30 days · 1st percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

5.5CVSS 3.1 · MEDIUM

  • ConfidentialityNone
  • IntegrityHigh
  • AvailabilityNone

What an attacker needs

  • ⚠Access: Requires local access to the host
  • ✓Privileges: No account or privileges required
  • ⚠User interaction: A user must take an action (click / open a file)
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-28900/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-28900/poc.json

Affected

Vendors Apple

Products Macos

Weakness (CWE)

  • CWE-290: Authentication Bypass by Spoofing
  • CWE-693: Protection Mechanism Failure

CVSS vector

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

Known Affected Software Configurations

VendorProductVersion range
AppleMacos≥ 14.0 and < 14.8.8
AppleMacos≥ 15.0 and < 15.7.8

All CVSS metrics

  • MEDIUM 5.5 v3.1 · ADP Primary
    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
  • MEDIUM 5.5 v3.1 · NVD Secondary
    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

References

Advisories

Sources: NVD · CVE.org · EPSS