CVE-2026-86071

Junrar is an open source Java RAR archive library. Prior to version 7.6.1, LocalFolderExtractor in src/main/java/com/github/junrar/LocalFolderExtractor.java can create directories outside the intended extraction root when processing a crafted archive entry. LocalFolderExtractor.createFile() validates only the final canonical file path, while LocalFolderExtractor.makeFile() creates intermediate path segments with unchecked mkdir() calls. An entry can therefore make the final path resolve inside the destination while causing intermediate directory creation outside it, enabling filesystem pollution or file-versus-directory squatting that can make later security-sensitive writes fail. The demonstrated impact is directory creation, not unconditional arbitrary file-content write. This issue is fixed in version 7.6.1.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/junrar/junrar/commit/e6e333b195a1e3ad271a18fd79d8ac1eb5289343
https://github.com/junrar/junrar/releases/tag/v7.6.1
https://github.com/junrar/junrar/security/advisories/GHSA-89m4-43j5-vhhx

Configurations

No configuration.

History

16 Sep 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 19:17

Updated : 2026-09-24 21:25

NVD link : CVE-2026-86071

Mitre link : CVE-2026-86071

CVE.ORG link : CVE-2026-86071

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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