CVE-2026-32147: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP ssh

Routine

MEDIUM 4.3UPGRADEUPGRADE

CVE-2026-32147 is a medium-severity flaw (CVSS 4.3) affecting erlang\/otp, erlang\/ssh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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)

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-21
Last modified	2026-10-26

Publisher (CNA): EEF · Vendor: erlang

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 12:15 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

erlang erlang\/otp UPGRADE

Affected: >= 17.0 and < 26.2.5.20 · >= 27.0 and < 27.3.4.11 · >= 28.0 and < 28.4.3

Fixed in: 26.2.5.20, 27.3.4.11, 28.4.3

Safe to downgrade to: a release before 17.0

1. Check installed version

apt-cache policy erlangotp || rpm -q erlangotp || erlangotp --version

2. UPGRADE to 26.2.5.20 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade erlangotp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade erlangotp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 17.0 (Debian / Ubuntu)

apt-cache madison erlangotp sudo apt install erlangotp=<VERSION_BEFORE_17.0> sudo apt-mark hold erlangotp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list erlangotp sudo dnf downgrade erlangotp-<VERSION_BEFORE_17.0> sudo dnf versionlock add erlangotp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

erlang erlang\/ssh UPGRADE

Affected: >= 3.0.1 and < 5.1.4.15 · >= 5.2 and < 5.2.11.7 · >= 5.5 and < 5.5.2

Fixed in: 5.1.4.15, 5.2.11.7, 5.5.2

Safe to downgrade to: a release before 3.0.1

1. Check installed version

apt-cache policy erlangssh || rpm -q erlangssh || erlangssh --version

2. UPGRADE to 5.1.4.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade erlangssh

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade erlangssh

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.0.1 (Debian / Ubuntu)

apt-cache madison erlangssh sudo apt install erlangssh=<VERSION_BEFORE_3.0.1> sudo apt-mark hold erlangssh

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list erlangssh sudo dnf downgrade erlangssh-<VERSION_BEFORE_3.0.1> sudo dnf versionlock add erlangssh

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-32147?

erlang\/otp: upgrade to 26.2.5.20, 27.3.4.11, 28.4.3; erlang\/ssh: upgrade to 5.1.4.15, 5.2.11.7, 5.5.2. Exact commands for each OS are on this page.

Is CVE-2026-32147 being exploited?

CVE-2026-32147 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-32147 affect?

CVE-2026-32147 affects erlang\/otp, erlang\/ssh. Severity is medium (CVSS 4.3). 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

How urgent is CVE-2026-32147?

Priority 22/100. No elevated risk signals yet.

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CVE-2026-49759 HIGH 8.2 UPGRADE UPGRADE Stack-based Buffer Overflow vulnerability in Erlang OTP erts (inet_drv) allows an unauthenticated remote attac
CVE-2026-42790 HIGH 8.1 UPGRADE Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_cert and public_key modules) al

References

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