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CVE-2026-45384 rikyoz CVE debrief

CVE-2026-45384 is a MEDIUM severity vulnerability in bit7z, a cross-platform C++ static library. The issue allows for arbitrary file overwrite via a symlink attack on predictable temp files during archive updates. This vulnerability has been patched in version 4.0.12.

Vendor
rikyoz
Product
bit7z
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-11
Advisory published
2026-06-10
Advisory updated
2026-06-11

Who should care

Users of bit7z library versions prior to 4.0.12 should update to the latest version to mitigate this vulnerability.

Technical summary

The vulnerability exists in bit7z versions prior to 4.0.12. An attacker could exploit this vulnerability by creating a symlink to a target file, allowing for arbitrary file overwrite during archive updates.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update bit7z to version 4.0.12 or later.

Evidence notes

CVE-2026-45384 has a CVSS score of 6.1 and is classified as MEDIUM severity. The vulnerability was published on [cve-org] and additional details can be found on [nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45384 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45384

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45384 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45384

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.