CVE-2026-32147

MEDIUM EPSS 27.3%
Published Apr 21, 20262mo ago · Modified Jun 17, 20261w ago
5.3 CVSS 4.0
Medium
Find Similar
Published Apr 21, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP ssh (ssh_sftpd module) allows an authenticated SFTP user to modify file attributes outside the configured chroot directory. The SFTP daemon (ssh_sftpd) stores the raw, user-supplied path in file handles instead of the chroot-resolved path. When SSH_FXP_FSETSTAT is issued on such a handle, file attributes (permissions, ownership, timestamps) are modified on the real filesystem path, bypassing the root directory boundary entirely. Any authenticated SFTP user on a server configured with the root option can modify file attributes of files outside the intended chroot boundary. The prerequisite is that a target file must exist on the real filesystem at the same relative path. Note that this vulnerability only allows modification of file attributes; file contents cannot be read or altered through this attack vector. If the SSH daemon runs as root, this enables direct privilege escalation: an attacker can set the setuid bit on any binary, change ownership of sensitive files, or make system configuration world-writable. This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:do_open/4 and ssh_sftpd:handle_op/4. This issue affects OTP from OTP 17.0 until OTP 28.4.3, 27.3.4.11, and 26.2.5.20 corresponding to ssh from 3.01 until 5.5.3, 5.2.11.7, and 5.1.4.15.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
27.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 6

VendorProductVersionRange
erlangerlang\/otp*≥17.0  –  <26.2.5.20
erlangerlang\/otp*≥27.0  –  <27.3.4.11
erlangerlang\/otp*≥28.0  –  <28.4.3
erlangerlang\/ssh*≥3.0.1  –  <5.1.4.15
erlangerlang\/ssh*≥5.2  –  <5.2.11.7
erlangerlang\/ssh*≥5.5  –  <5.5.2

References 5

  • cna.erlef.org https://cna.erlef.org/cves/CVE-2026-32147.html
    Vendor Advisory
  • github.com https://github.com/erlang/otp/commit/28c5d5a6c5f873dc701b597276271763e7d1c004
    Patch
  • github.com https://github.com/erlang/otp/security/advisories/GHSA-28jg-mw9x-hpm5
    Vendor Advisory
  • osv.dev https://osv.dev/vulnerability/EEF-CVE-2026-32147
    Third Party Advisory
  • erlang.org https://www.erlang.org/doc/system/versions.html#order-of-versions
    Product

Remediation

  • github.com https://github.com/erlang/otp/commit/28c5d5a6c5f873dc701b597276271763e7d1c004
    Patch