Home/CVE/A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sft
CVE

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/sft

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.

MEDIUM · CVSS 5.3 EPSS 0.00043
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125Out-of-bounds Read
▤

Affected Products & Versions

1
libssh<= 0.11.3
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · cna@vuldb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Mar 2026 · 11:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

8
suse-csafSUSE-SU-2026:1565-1
suse-csafSUSE-SU-2026:1344-1
suse-csafSUSE-SU-2026:1310-1
msrcCVE-2026-3731
suse-csafSUSE-SU-2026:0936-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60Patch
https://vuldb.com/?ctiid.349709Permissions RequiredVDB Entry
https://vuldb.com/?id.349709Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.767120Third Party AdvisoryVDB Entry
https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xzPatchThird Party Advisory
https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txtProduct
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