CVE-2026-48855
Fixed in a distro release EPSS <1%CVSS 2.3
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Erlang OTP ssh (ssh_sftpd module) allows File Discovery. The SSH_FXP_READLINK handler in ssh_sftpd sends the raw result of file:read_link/2 to the client without calling chroot_filename/2 to strip the backend root prefix. An authenticated SFTP client can create a symlink inside the chroot pointing to /; ssh_sftpd resolves the target to the absolute backend root and stores it on disk. Reading the symlink back via SSH_FXP_READLINK returns that absolute path, for example /data/sftp, instead of the chrooted value /. The information disclosed is the absolute filesystem path of the SFTP root directory and of any symlink targets within it. No file contents, credentials, or access to paths outside the root directory are obtainable through this issue alone. This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl. This issue affects OTP from OTP 17.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to ssh from 3.0.1 before 5.2.11.8, 5.5.2.1, and 6.0.1. Whether OTP before OTP 17.0, corresponding to ssh before 3.0.1, is affected is unknown.
Products: erlang otp
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | erlang | no fix |
| Debian 13 | erlang | 1:27.3.4.1+dfsg-1+deb13u3 |
| Debian 14 | erlang | 1:29.0.2+dfsg-1 |
| Red Hat hummingbird 1 | erlang27 | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-asn1 | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-common_test | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-compiler | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-crypto | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-debugger | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-dialyzer | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-diameter | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-edoc | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-eldap | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-erl_interface | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-erts | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-et | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-eunit | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-examples | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-ftp | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-gdb-tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-inets | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-jinterface | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-kernel | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-megaco | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-mnesia | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-observer | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-odbc | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-os_mon | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-parsetools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-public_key | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-reltool | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-runtime_tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-sasl | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-snmp | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-ssh | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-ssl | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-stdlib | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-syntax_tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-tftp | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-wx | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-xmerl | 0:27.3.4.17-1.hum1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | erlang26 | 26.2.1-150300.7.28.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | erlang26 | 26.2.1-150300.7.28.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | erlang | 23.3.4.19-150300.3.39.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | erlang26 | 26.2.1-150300.7.28.1 |
| Ubuntu 22.04 LTS | erlang | 1:24.2.1+dfsg-1ubuntu0.8 |
| Ubuntu 24.04 LTS | erlang | 1:25.3.2.8+dfsg-1ubuntu4.8 |
| Ubuntu 25.10 | erlang | no fix |
| Ubuntu 26.04 LTS | erlang | 1:27.3.4.6+dfsg-1ubuntu0.2 |
| Ubuntu Pro 14.04 LTS | erlang | 1:16.b.3-dfsg-1ubuntu2.2+esm3 |
| Ubuntu Pro 16.04 LTS | erlang | 1:18.3-dfsg-1ubuntu3.1+esm4 |
| Ubuntu Pro 18.04 LTS | erlang | 1:20.2.2+dfsg-1ubuntu2+esm4 |
| Ubuntu Pro 20.04 LTS | erlang | 1:22.2.7+dfsg-1ubuntu0.5+esm3 |
| openSUSE Tumbleweed | erlang | 28.5.0.4-1.1 |
| openSUSE Tumbleweed | erlang27 | 27.1.3-3.1 |