CVE-2026-41245Public exploitNetwork attack vector

Arbitrary file write via sibling-prefix path check

Published Apr 20, 2026 · Updated Apr 20, 2026

Path traversal in Junrar before 7.5.10 allows attackers to write arbitrary files into sibling directories via a crafted RAR archive. LocalFolderExtractor.createDirectory and createFile compare canonical paths with a bare destination string prefix, so a sibling path whose name begins with the extraction directory passes validation. The flaw is reached when consuming code extracts an attacker-controlled archive, and written content remains limited by the host process's filesystem permissions.

CVSS severity5.9
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Junrar before 7.5.10 allows attackers to write arbitrary files into sibling directories via a crafted RAR archive. LocalFolderExtractor.createDirectory and createFile compare canonical paths with a bare destination string prefix, so a sibling path whose name begins with the extraction directory passes validation. The flaw is reached when consuming code extracts an attacker-controlled archive, and written content remains limited by the host process's filesystem permissions.

The record

CVE
CVE-2026-41245
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
junrar
Product
junrar
Classifications
CWE-22
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.5.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

junrar · junrarversion=< 7.5.10

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
9.3Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo