CVE-2026-3731
A weakness has been identified in libssh up to 0.11.3.
Does this matter?
Lower severity and a low EPSS score (0.63%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.63% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-125
- Affected
- libssh/libssh
- Source
- cna@vuldb.com
References
- https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60Patch
- https://vuldb.com/?ctiid.349709Permissions Required, VDB Entry
- https://vuldb.com/?id.349709Third Party Advisory, VDB Entry
- https://vuldb.com/?submit.767120Third Party Advisory, VDB Entry
- https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xzPatch, Third Party Advisory
- https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txtProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.