CVE-2026-45384 PUBLISHED

bit7z: Arbitrary File Overwrite via Symlink Attack on Predictable Temp File During Archive Update

Assigner: GitHub_M
Reserved: 12.05.2026 Published: 10.06.2026 Updated: 11.06.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
CVSS Score: 6.1

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

CVSS 3.1

Product Status

Vendor	rikyoz
Product	bit7z
Versions	Version < 4.0.12 is affected

References

https://github.com/rikyoz/bit7z/security/advisories/GHSA-wjch-42rm-q53h
https://github.com/rikyoz/bit7z/releases/tag/v4.0.12

Problem Types

CWE-59: Improper Link Resolution Before File Access ('Link Following') CWE
CWE-377: Insecure Temporary File CWE