Libssh: improper sanitation of paths received from scp servers

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-0964
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-26 21:17:00 UTC
Updated2026-03-30 13:26:50 UTC
DescriptionA malicious SCP server can send unexpected paths that could make the client application override local files outside of working directory. This could be misused to create malicious executable or configuration files and make the user execute them under specific consequences. This is the same issue as in OpenSSH, tracked as CVE-2019-6111.

Risk And Classification

Primary CVSS: v3.0 5 MEDIUM from [email protected]

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

EPSS: 0.000340000 probability, percentile 0.099230000 (date 2026-04-01)

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

VersionSourceTypeScoreSeverityVector
3.0[email protected]Secondary5MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
3.0CNACVSS5MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
CNA Red Hat Red Hat OpenShift Container Platform 4 Not specified Not specified

References

ReferenceSourceLinkTags
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases [email protected] www.libssh.org
access.redhat.com/security/cve/CVE-2026-0964 [email protected] access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank CTyun (Red-Shield Security Lab) and Jakub Jelen (libssh) for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-02-04T23:37:53.443ZReported to Red Hat.
CNA2026-02-10T18:44:42.346ZMade public.

Workarounds

CNA: Do not use SCP! SCP is deprecated for several years and will be removed in future releases! If you have to, the application MUST validate the path returned from `ssh_scp_request_get_filename()` is the path the application requested. The libssh does not do any writing in this case.

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