CVE-2026-16517 (Low) detected in libarchivev3.8.5

[mend-bolt-for-github]

CVE-2026-16517 - Low Severity Vulnerability

Vulnerable Library - libarchivev3.8.5

Multi-format archive and compression library

Library home page: https://github.com/libarchive/libarchive.git

Found in base branches: stable/4.0, master

Vulnerable Source Files (1)

/contrib/libarchive/libarchive/archive_write_set_format_zip.c

Vulnerability Details

A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.

Publish Date: 2026-07-21

URL: CVE-2026-16517

CVSS 3 Score Details (2.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low

For more information on CVSS3 Scores, click here.

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[laffer1]

updated via several PRs. Details in issue #450