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 29.0.2, OTP 28.5.0.2 and OTP 27.3.4.13, corresponding to ssh from 3.0.1 before 6.0.1, 5.5.2.1 and 5.2.11.8.
References
| Link | Resource |
|---|---|
| https://cna.erlef.org/cves/CVE-2026-48855.html | Mitigation Third Party Advisory |
| https://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6 | Patch |
| https://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh | Mitigation Vendor Advisory |
| https://osv.dev/vulnerability/EEF-CVE-2026-48855 | Mitigation Third Party Advisory |
| https://www.erlang.org/doc/system/versions.html#order-of-versions | Product |
Configurations
Configuration 1 (hide)
|
History
24 Jul 2026, 15:17
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) 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 29.0.2, OTP 28.5.0.2 and OTP 27.3.4.13, corresponding to ssh from 3.0.1 before 6.0.1, 5.5.2.1 and 5.2.11.8. |
15 Jun 2026, 18:23
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 6.5 |
| CPE | cpe:2.3:a:erlang:erlang\/ssh:*:*:*:*:*:*:*:* cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* |
|
| References | () https://cna.erlef.org/cves/CVE-2026-48855.html - Mitigation, Third Party Advisory | |
| References | () https://github.com/erlang/otp/commit/8f4224a0d2676b0653d2c71a889a956e8c2c62d6 - Patch | |
| References | () https://github.com/erlang/otp/security/advisories/GHSA-pv7g-pjrq-x2fh - Mitigation, Vendor Advisory | |
| References | () https://osv.dev/vulnerability/EEF-CVE-2026-48855 - Mitigation, Third Party Advisory | |
| References | () https://www.erlang.org/doc/system/versions.html#order-of-versions - Product | |
| First Time |
Erlang erlang\/ssh
Erlang Erlang erlang\/otp |
10 Jun 2026, 16:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-10 16:17
Updated : 2026-07-24 15:17
NVD link : CVE-2026-48855
Mitre link : CVE-2026-48855
CVE.ORG link : CVE-2026-48855
JSON object : View
Products Affected
erlang
- erlang\/ssh
- erlang\/otp
CWE
CWE-200
Exposure of Sensitive Information to an Unauthorized Actor