Path traversal in otp - CVE-2026-23942

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Main Vulnerability Database Vulnerabilities #VU125774

Path traversal in otp - CVE-2026-23942

Published: April 10, 2026


Vulnerability identifier: #VU125774
CSH Severity: Low
CVSS v4: 5.3 [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]
CVE-ID: CVE-2026-23942
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to access files outside the configured root directory.

The vulnerability exists due to path traversal in ssh_sftpd when validating file paths using string prefix matching for the root option. A remote user can request paths in sibling directories that share a common name prefix to access files outside the configured root directory.

The issue applies only when the root option is configured under the assumption that it provides complete directory isolation.


Affected software

otp
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
Server Applications Module
openSUSE Leap
openEuler
PowerVC
erlang-edoc
erlang-inets
erlang-hipe
erlang-ftp
erlang-examples
erlang-eunit
erlang-et
erlang-erts
erlang-erl_interface
erlang-erl_docgen
erlang-eldap
erlang-xmerl
erlang-diameter
erlang-dialyzer
erlang-debugsource
erlang-debuginfo
erlang-debugger
erlang-crypto
erlang-compiler
erlang-common_test
erlang-asn1
erlang
erlang-kernel
erlang-wx
erlang-tools
erlang-tftp
erlang-syntax_tools
erlang-stdlib
erlang-ssl
erlang-ssh
erlang-snmp
erlang-sasl
erlang-reltool
erlang-public_key
erlang-parsetools
erlang-os_mon
erlang-odbc
erlang-observer
erlang-mnesia
erlang-megaco
erlang-jinterface
erlang-runtime_tools
erlang-doc
erlang-epmd-debuginfo
erlang-observer-src
erlang-diameter-src
erlang-reltool-src
erlang-jinterface-src
erlang-dialyzer-debuginfo
erlang-src
erlang-dialyzer-src
erlang-debugger-src
erlang-wx-debuginfo
erlang-et-src
erlang-epmd
erlang-wx-src
erlang26-reltool-src
erlang26-diameter-src
erlang26-et-src
erlang26-diameter
erlang26-observer-src
erlang26-debuginfo
erlang26-observer
erlang26-wx-src
erlang26-wx
erlang26
erlang26-jinterface
erlang26-epmd
erlang26-epmd-debuginfo
erlang26-doc
erlang26-debugsource
erlang26-debugger-src
erlang26-wx-debuginfo
erlang26-dialyzer-src
erlang26-reltool
erlang26-et
erlang26-debugger
erlang26-dialyzer
erlang26-src
erlang26-jinterface-src
erlang26-dialyzer-debuginfo

How to mitigate CVE-2026-23942

Install security update from vendor's website.

otp - addressed in versions 26.2.5.18, 27.3.4.9, 28.4.1
erlang-edoc - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-inets - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-hipe - update to 23.3.4.9-10
erlang-ftp - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-examples - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-eunit - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-et - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-erts - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-erl_interface - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-erl_docgen - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-eldap - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-xmerl - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-diameter - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-dialyzer - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-debugsource - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-debuginfo - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-debugger - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-crypto - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-compiler - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-common_test - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-asn1 - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-kernel - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-wx - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-tools - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-tftp - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-syntax_tools - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-stdlib - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-ssl - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-ssh - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-snmp - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-sasl - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-reltool - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-public_key - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-parsetools - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-os_mon - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-odbc - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-observer - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-mnesia - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-megaco - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-jinterface - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-runtime_tools - addressed in versions 23.3.4.9-10, 25.3.2.6-13
erlang-doc - update to 23.3.4.19-150300.3.32.1
erlang-epmd-debuginfo - update to 23.3.4.19-150300.3.32.1
erlang-observer-src - update to 23.3.4.19-150300.3.32.1
erlang-diameter - update to 23.3.4.19-150300.3.32.1
erlang-et - update to 23.3.4.19-150300.3.32.1
erlang-diameter-src - update to 23.3.4.19-150300.3.32.1
erlang-reltool-src - update to 23.3.4.19-150300.3.32.1
erlang-jinterface-src - update to 23.3.4.19-150300.3.32.1
erlang-dialyzer-debuginfo - update to 23.3.4.19-150300.3.32.1
erlang-jinterface - update to 23.3.4.19-150300.3.32.1
erlang-reltool - update to 23.3.4.19-150300.3.32.1
erlang-debugger - update to 23.3.4.19-150300.3.32.1
erlang-src - update to 23.3.4.19-150300.3.32.1
erlang-observer - update to 23.3.4.19-150300.3.32.1
erlang-debuginfo - update to 23.3.4.19-150300.3.32.1
erlang-dialyzer-src - update to 23.3.4.19-150300.3.32.1
erlang-debugger-src - update to 23.3.4.19-150300.3.32.1
erlang-dialyzer - update to 23.3.4.19-150300.3.32.1
erlang-debugsource - update to 23.3.4.19-150300.3.32.1
erlang - update to 23.3.4.19-150300.3.32.1
erlang-wx - update to 23.3.4.19-150300.3.32.1
erlang-wx-debuginfo - update to 23.3.4.19-150300.3.32.1
erlang-et-src - update to 23.3.4.19-150300.3.32.1
erlang-epmd - update to 23.3.4.19-150300.3.32.1
erlang-wx-src - update to 23.3.4.19-150300.3.32.1
erlang-src - update to 25.3.2.6-13
erlang26-reltool-src - update to 26.2.1-150300.7.25.1
erlang26-diameter-src - update to 26.2.1-150300.7.25.1
erlang26-et-src - update to 26.2.1-150300.7.25.1
erlang26-diameter - update to 26.2.1-150300.7.25.1
erlang26-observer-src - update to 26.2.1-150300.7.25.1
erlang26-debuginfo - update to 26.2.1-150300.7.25.1
erlang26-observer - update to 26.2.1-150300.7.25.1
erlang26-wx-src - update to 26.2.1-150300.7.25.1
erlang26-wx - update to 26.2.1-150300.7.25.1
erlang26 - update to 26.2.1-150300.7.25.1
erlang26-jinterface - update to 26.2.1-150300.7.25.1
erlang26-epmd - update to 26.2.1-150300.7.25.1
erlang26-epmd-debuginfo - update to 26.2.1-150300.7.25.1
erlang26-doc - update to 26.2.1-150300.7.25.1
erlang26-debugsource - update to 26.2.1-150300.7.25.1
erlang26-debugger-src - update to 26.2.1-150300.7.25.1
erlang26-wx-debuginfo - update to 26.2.1-150300.7.25.1
erlang26-dialyzer-src - update to 26.2.1-150300.7.25.1
erlang26-reltool - update to 26.2.1-150300.7.25.1
erlang26-et - update to 26.2.1-150300.7.25.1
erlang26-debugger - update to 26.2.1-150300.7.25.1
erlang26-dialyzer - update to 26.2.1-150300.7.25.1
erlang26-src - update to 26.2.1-150300.7.25.1
erlang26-jinterface-src - update to 26.2.1-150300.7.25.1
erlang26-dialyzer-debuginfo - update to 26.2.1-150300.7.25.1

External References

Related Security Bulletins