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Medium, CVSS 5.9

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

CVE-2026-41245GHSA-hf5p-q87m-crj7

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (com.github.junrar:junrar 7.5.10), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
  • CVE-2026-41245: 0.34% estimated exploitation activity in the next 30 days; percentile 27.08 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary 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. Example Given an extraction directory set to /tmp/extract, a crafted archive with an entry with the filename as ../extractevil/file.txt would be actually extracted to /tmp/extractevil/file.txt. Details The createDirectory() and createFile() methods inLocalFolderExtractor validate extraction paths using a string prefix.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-hf5p-q87m-crj7

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-41245

Advisory: Junrar: Path Traversal (Zip-Slip) via Sibling Directory Name Prefix
IDs: CVE-2026-41245, GHSA-hf5p-q87m-crj7
Record: https://patchnext.com/advisories/cve-2026-41245 (revision 1, source checked 26 Oct 2026, 16:45 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: com.github.junrar:junrar 7.5.10. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven com.github.junrar:junrar: affected < 7.5.10; fixed in 7.5.10

## Suggested inspection (read-only)
- Maven com.github.junrar:junrar: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on com.github.junrar:junrar.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-hf5p-q87m-crj7 (GitHub-reviewed advisory GHSA-hf5p-q87m-crj7 lists affected ranges: Maven com.github.junrar:junrar >=0 <7.5.10)

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