CVE-2026-48855
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk19th percentile — higher than 19% of all known CVEs
Summary
A vulnerability in the ssh_sftpd module of Erlang OTP allows the exposure of sensitive information through file discovery. An authenticated SFTP client can create a symlink that reveals the absolute path to the SFTP root directory.
Risk Assessment
The disclosure of the absolute filesystem path may lead to potential attacks on the infrastructure, although it does not allow access to file contents or paths outside the root directory.
Recommendation
It is recommended to upgrade to Erlang OTP version 29.0.2 or later to mitigate this vulnerability.
Original NVD description (English source)
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 29.0.2, 28.5.0.2 and 27.3.4.13 corresponding to ssh from 3.0.1 before 6.0.1, 5.5.2.1 and 5.2.11.8.