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Findings

CVE-2026-20639

An integer overflow was addressed with improved input validation.

Published Mar 25, 2026 · updated Jun 17, 2026 · apple macos

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 25, 2026 · NIST NVD

    Detected

    An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

  2. Jun 17, 2026 · NIST NVD

    Updated

    An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

Affected

  • cpe apple/macosversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-20639

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-20639

    An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

    nvd.nist.gov

References