CVE-2026-3731
Published: March 11, 2026Last modified: March 17, 2026
Description
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libssh | Fixed (0.11.4-r0) |
| 25 LTS | libssh | Fixed (0.11.4-r0) | |
| Stream | libssh | Fixed (0.11.4-r0) |
References
- https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60
- https://vuldb.com/?ctiid.349709
- https://vuldb.com/?id.349709
- https://vuldb.com/?submit.767120
- https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xz
- https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txt