CVE-2026-41245: Junrar: Path Traversal (Zip-Slip) via Sibling Directory Name Prefix

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-20 · updated 2026-08-18
Weakness: CWE-22

Description

Junrar is an open source java RAR archive library. Prior to version 7.5.10, a path traversal vulnerability in `LocalFolderExtractor` allows an attacker to write arbitrary files with attacker-controlled content into sibling directories when a crafted RAR archive is extracted. Version 7.5.10 fixes the issue.

Affected products

junrar: before 7.5.10 — fixed in 7.5.10

How to fix

Upgrade to a fixed version: junrar 7.5.10. Check the vendor advisory for mitigations.

References

https://github.com/junrar/junrar/commit/d77e9a83eb721cd51f9c23d7869d0e6ad7f952d7
https://github.com/junrar/junrar/releases/tag/v7.5.10
https://github.com/junrar/junrar/security/advisories/GHSA-hf5p-q87m-crj7
https://access.redhat.com/security/cve/CVE-2026-41245
https://bugzilla.redhat.com/show_bug.cgi?id=2459769
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41245.json

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