CVE-2026-45384: CWE-59: Improper Link Resolution Before File Access ('Link Following') in rikyoz bit7z
bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files. Prior to version 4.0.12, there is an arbitrary file overwrite vulnerability via symlink attack on predictable temp files during archive update. This issue has been patched in version 4.0.12.
AI Analysis
Technical Summary
CVE-2026-45384 describes an arbitrary file overwrite vulnerability in bit7z before version 4.0.12. The flaw arises from improper link resolution before file access (CWE-59), allowing a symlink attack on predictable temporary files during archive update operations. This can lead to overwriting arbitrary files on the system. The vulnerability has been patched in version 4.0.12.
Potential Impact
An attacker with local access and low privileges can exploit this vulnerability to overwrite arbitrary files, potentially leading to integrity violations and limited availability impact. The CVSS 3.1 score is 6.1 (medium severity), reflecting the need for local privileges but no user interaction and a low attack complexity.
Mitigation Recommendations
Upgrade bit7z to version 4.0.12 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated in the available data.
CVE-2026-45384: CWE-59: Improper Link Resolution Before File Access ('Link Following') in rikyoz bit7z
Description
bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files. Prior to version 4.0.12, there is an arbitrary file overwrite vulnerability via symlink attack on predictable temp files during archive update. This issue has been patched in version 4.0.12.
CVSS v3.1
Score 6.1medium
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45384 describes an arbitrary file overwrite vulnerability in bit7z before version 4.0.12. The flaw arises from improper link resolution before file access (CWE-59), allowing a symlink attack on predictable temporary files during archive update operations. This can lead to overwriting arbitrary files on the system. The vulnerability has been patched in version 4.0.12.
Potential Impact
An attacker with local access and low privileges can exploit this vulnerability to overwrite arbitrary files, potentially leading to integrity violations and limited availability impact. The CVSS 3.1 score is 6.1 (medium severity), reflecting the need for local privileges but no user interaction and a low attack complexity.
Mitigation Recommendations
Upgrade bit7z to version 4.0.12 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-12T00:51:29.087Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a29d0220e53e738839869c0
Added to database: 6/10/2026, 8:59:14 PM
Last enriched: 6/10/2026, 9:15:26 PM
Last updated: 6/11/2026, 12:00:11 AM
Views: 7
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