CVE-2026-28208: Junrar is an open source java RAR archive library

Q: How do I fix CVE-2026-28208?

junrar: upgrade to 7.5.8. Exact commands for each OS are on this page.

Q: Is CVE-2026-28208 being exploited?

CVE-2026-28208 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28208 affect?

CVE-2026-28208 affects junrar. Severity is medium (CVSS 5.9). Junrar is an open source java RAR archive library. Prior to version 7.5.8, a backslash path traversal vulnerability in `LocalFolderExtractor` allows an attacker to write arbitrary files with attacker-controlled content anywhere on the files

Q: How urgent is CVE-2026-28208?

Priority 55/100. EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.9REMOTEUPGRADE

CVE-2026-28208 is a medium-severity flaw (CVSS 5.9) affecting junrar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Junrar is an open source java RAR archive library. Prior to version 7.5.8, a backslash path traversal vulnerability in `LocalFolderExtractor` allows an attacker to write arbitrary files with attacker-controlled content anywhere on the filesystem when a crafted RAR archive is extracted on Linux/Unix. This can often lead to remote code execution (e.g., overwriting shell profiles, source code, cron jobs, etc). Version 7.5.8 has a fix for the issue.

Why this priority

EPSS top 3%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	14.7% (top 3%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-02-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: junrar project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-26 23:16 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

junrar project junrar UPGRADE

Affected: < 7.5.8

Fixed in: 7.5.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy junrar || rpm -q junrar || junrar --version

2. UPGRADE to 7.5.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade junrar

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade junrar

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Maven · com.github.junrar:junrar · FIXED · 7.5.8 · vulnerable: < 7.5.8 · source

Set com.github.junrar:junrar to 7.5.8 or later in pom.xml or build.gradle, then rebuild and redeploy.

Fedora ELN · openldap · FIXED · 2.6.16-1.eln159 · FEDORA-2026-4b30c86326 · source

sudo dnf upgrade --advisory=FEDORA-2026-4b30c86326

Fedora 46 · php-pecl-yac · FIXED · 3.0.1-2.fc46 · FEDORA-2026-5f43289aa2 · source

sudo dnf upgrade --advisory=FEDORA-2026-5f43289aa2

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/junrar/junrar/security/advisories/GHSA-j273-m5qq-6825

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28208?

junrar: upgrade to 7.5.8. Exact commands for each OS are on this page.

Is CVE-2026-28208 being exploited?

CVE-2026-28208 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28208 affect?

CVE-2026-28208 affects junrar. Severity is medium (CVSS 5.9). Junrar is an open source java RAR archive library. Prior to version 7.5.8, a backslash path traversal vulnerability in `LocalFolderExtractor` allows an attacker to write arbitrary files with attacker-controlled content anywhere on the files

How urgent is CVE-2026-28208?

Priority 55/100. EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

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