CVE-2026-49238: An issue was discovered in Canonical Multipass before version 1.16.3

Q: How do I fix CVE-2026-49238?

multipass: upgrade to 1.16.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-49238 being exploited?

CVE-2026-49238 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-49238 affect?

CVE-2026-49238 affects multipass. Severity is high (CVSS 8.4). An issue was discovered in Canonical Multipass before version 1.16.3. The host-side SFTP server component (sshfs_server), which executes with root privileges on the host, contains a path containment bypass vulnerability within its validate_

Q: How urgent is CVE-2026-49238?

Priority 45/100. High severity; Public exploit reference

This month

HIGH 8.4UPGRADE

CVE-2026-49238 is a high-severity flaw (CVSS 8.4) affecting multipass. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Canonical Multipass before version 1.16.3. The host-side SFTP server component (sshfs_server), which executes with root privileges on the host, contains a path containment bypass vulnerability within its validate_path function in src/sshfs_mount/sftp_server.cpp. The function performs a plain string prefix comparison on requested paths without path separator validation or dot-dot (..) normalization. A local attacker with

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-05-28
Last modified	2026-10-14

Publisher (CNA): Canonical Ltd. · Vendor: canonical

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-28 14:16 UTCPublished CVE record published
2026-10-14 20:10 UTCUpdated Record last modified

canonical multipass UPGRADE

Affected: < 1.16.3

Fixed in: 1.16.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.16.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade multipass

Note

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

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-2026-49238?

multipass: upgrade to 1.16.3. Exact commands for each OS are on this page.

Is CVE-2026-49238 being exploited?

CVE-2026-49238 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-2026-49238 affect?

CVE-2026-49238 affects multipass. Severity is high (CVSS 8.4). An issue was discovered in Canonical Multipass before version 1.16.3. The host-side SFTP server component (sshfs_server), which executes with root privileges on the host, contains a path containment bypass vulnerability within its validate_

How urgent is CVE-2026-49238?

Priority 45/100. High severity; Public exploit reference

Related CVEs

CVE-2026-49237 HIGH 7.8 UPGRADE An issue was discovered in Canonical Multipass for macOS before version 1.16.3 due to an incomplete fix for CV

References

← Back to latest CVEs