Path traversal in muCommander archive extraction to FTP and SFTP
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
muCommander through 1.6.2 contains a path traversal flaw (CWE-22) in its UnpackJob class. The ZipSlip check can be bypassed with unnormalized remote paths, so files can be written outside the destination folder. An unauthenticated attacker can craft TAR or ZIP entries that, when a user extracts them to FTP or SFTP folders, create or overwrite files writable by the user's remote account.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
muCommander through 1.6.2 contains a path traversal vulnerability in UnpackJob that allows attackers to write files outside the destination folder by bypassing its ZipSlip check with unnormalized remote paths. Attackers can craft TAR or ZIP entries like ../../.ssh/authorized_keys that, when extracted to FTP or SFTP folders, create or overwrite files writable by the user's remote account.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| muCommander | muCommander | up to 1.6.2 | — | No fix listed | CNA |
- muCommander VendormuCommander Affected up to 1.6.2 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for muCommander.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Vendor assessments
Timeline
- 2026-10-13 Threatist record created from CVE-2026-110231
- 2026-10-13 Alias added: GHSA-p487-3q65-h494
- 2026-10-14 Priority changed: MEDIUM → LOW
- 2026-10-26 CISA SSVC decision points changed
- 2026-10-26 Priority changed: LOW → MEDIUM
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 4
- https://github.com/mucommander/mucommander/blob/3bc2118e13681a8018b84a06f1c5fea4a3f940f7/mucommander-core/src/main/java/com/mucommander/job/impl/UnpackJob.java#L233-L256
- https://github.com/mucommander/mucommander/blob/3bc2118e13681a8018b84a06f1c5fea4a3f940f7/mucommander-commons-file/src/main/java/com/mucommander/commons/file/AbstractFile.java#L1021-L1023
- https://github.com/mucommander/mucommander/blob/3bc2118e13681a8018b84a06f1c5fea4a3f940f7/mucommander-protocol-sftp/src/main/java/com/mucommander/commons/file/protocol/sftp/SFTPFile.java#L586-L622
- 1.6.2-1 Release Notes
More muCommander vulnerabilities
- TI-2008-01893 muCommander before 0.8.2 stores credentials.xml with insecure permissions, which allows… CVSS 2.0LOW 2.1
Sources
- CVE-2026-110231 · CVE Program
- CVE-2026-110231 · NVD
- FIRST EPSS
- GHSA-p487-3q65-h494 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-110231 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences