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CVE-2026-43747

HIGH 7.1 ALL-YEARS

Published 2026-07-27 · Last modified 2026-07-28 · apple · NVD: Analyzed

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Parsing a maliciously crafted file may lead to an unexpected app termination.

ELEVATED IMPACT

Severe if exploited (CVSS 7.1), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 6th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

7.1CVSS 3.1 · HIGH · ADP

  • ConfidentialityHigh
  • IntegrityNone
  • AvailabilityHigh

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

No public PoC is currently catalogued.

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Affected

Vendors Apple

Products Macos

Weakness (CWE)

  • CWE-125: Out-of-bounds Read

CVSS vector

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

References and research data (JSON)

Known Affected Software Configurations

VendorProductVersion range
AppleMacos≥ 14.0 and < 14.8.8
AppleMacos≥ 15.0 and < 15.7.8
AppleMacos≥ 26.0 and < 26.6

All CVSS metrics

  • HIGH 7.1 v3.1 · ADP Primary
    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
  • HIGH 7.1 v3.1 · NVD Secondary
    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

References

Advisories

Sources: NVD · CVE.org · All sources and attribution · EPSS