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CVE-2026-23942

nvd nist
Published: Mar 13, 2026Modified: Jul 24, 2026

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5.3
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (Secondary)

Description

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP (ssh_sftpd module) allows Path Traversal. This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:is_within_root/2. The SFTP server uses string prefix matching via lists:prefix/2 rather than proper path component validation when checking if a path is within the configured root directory. This allows authenticated users to access sibling directories that share a common name prefix with the configured root directory. For example, if root is set to /home/user1, paths like /home/user10 or /home/user1_backup would incorrectly be considered within the root. This issue affects OTP from OTP 17.0 before OTP 28.4.1, OTP 27.3.4.9 and OTP 26.2.5.18, corresponding to ssh from 3.0.1 before 5.5.1, 5.2.11.6 and 5.1.4.14.

Affected (6)

Erlang
2 products
Erlang/otp
Erlang/ssh
Configuration A
6 vulnerable
Vulnerable SoftwareAffected Versions
Erlang
Erlang/otp
From 17.0 to 26.2.5.18
Erlang/otp
From 27.0 to 27.3.4.9
Erlang/otp
From 28.0 to 28.4.1
Erlang
Erlang/ssh
From 3.0.1 to 5.1.4.14
Erlang/ssh
From 5.2 to 5.2.11.6
Erlang/ssh
From 5.5 to 5.5.1

Related CWEs

CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (7)

Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Vendor Advisory
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Patch
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Patch
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Patch
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
MitigationVendor Advisory
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Vendor Advisory
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Product

Timeline

No history available yet.