CVE-2026-45384

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

CVSS 6.1 MEDIUMEPSS 0.1%CWE-377 CWE-59

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.1EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

rikyoz · bit7z

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References

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