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CVE-2026-45380VulnerabilityPublished

CVE-2026-45380: rikyoz bit7z · Path Traversal

Affects rikyoz bit7zSource CVE Database V5

0

Not known to be exploited · CVSS 3.6 Low : upgrade to 4.0.12 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
3.6Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.0.12
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Upgrade bit7z and rikyoz/bit7z to 4.0.12.

Affected software

ProductAffectedFixed in
rikyozbit7zAffected
  • <4.0.12
Fixed in
  • 4.0.12
GitHubrikyoz/bit7zpkg:github/rikyoz/bit7zOther threatsAffected
  • <4.0.12
Fixed in
  • 4.0.12

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade bit7z to version 4.0.12 or later, where this vulnerability is patched. No other mitigation is indicated or required.

Description

bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files. Prior to version 4.0.12, a one-byte off-by-one error in SafeOutPathBuilder::restoreSymlink() allows an attacker to craft a .7z archive that, when extracted with bit7z on any non-Windows platform, creates a symlink escaping the intended output directory. Subsequent archive entries extracted through this symlink write arbitrary files outside the extraction directory with the permissions of the extracting process. This issue has been patched in version 4.0.12.

References

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