CVE-2026-3731

A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.

CVSS v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60	Patch
https://vuldb.com/?ctiid.349709	Permissions Required VDB Entry
https://vuldb.com/?id.349709	Third Party Advisory VDB Entry
https://vuldb.com/?submit.767120	Third Party Advisory VDB Entry
https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xz	Patch Third Party Advisory
https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txt	Product

Configurations

Configuration 1 (hide)

cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-08 11:15

Updated : 2026-03-12 19:02

NVD link : CVE-2026-3731

Mitre link : CVE-2026-3731

CVE.ORG link : CVE-2026-3731

JSON object : View

Products Affected

libssh

libssh

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-125

Out-of-bounds Read

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The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component."}, {"lang": "es", "value": "Se ha identificado una debilidad en libssh hasta la versi\u00f3n 0.11.3. El elemento afectado es la funci\u00f3n sftp_extensions_get_name/sftp_extensions_get_data del archivo src/sftp.c del componente Gestor de Nombres de Extensi\u00f3n SFTP. La ejecuci\u00f3n de una manipulaci\u00f3n del argumento idx puede llevar a una lectura fuera de l\u00edmites. El ataque puede realizarse de forma remota. La actualizaci\u00f3n a las versiones 0.11.4 y 0.12.0 es suficiente para resolver este problema. Este parche se denomina 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. Debe actualizar el componente afectado."}], "lastModified": "2026-03-12T19:02:31.637", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2366D711-FD0B-4A04-92BA-DE6DA0ED1BCF", "versionEndIncluding": "0.11.3"}], "operator": "OR"}]}], "sourceIdentifier": "cna@vuldb.com"}