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5 vulnerabilities found for Multipass by Canonical

CVE-2026-49237 (GCVE-0-2026-49237)
Vulnerability from cvelistv5
Published
2026-05-28 13:22
Modified
2026-05-28 15:15
CWE
  • CWE-276 - Incorrect default permissions
Summary
An issue was discovered in Canonical Multipass for macOS before version 1.16.3 due to an incomplete fix for CVE-2025-5199. While the patch in version 1.16.0 updated the ownership of the multipassd daemon binary to root:wheel, five co-located binaries (multipass, qemu-img, qemu-system-aarch64, qemu-system-x86_64, and sshfs_server) in /Library/Application Support/com.canonical.multipass/bin/ retain ownership by the installing user and remain writable. Because the root LaunchDaemon (com.canonical.multipassd.plist) configures a PATH environment variable that prioritizes this user-writable directory and invokes these auxiliary binaries by their bare names, a local attacker can replace an auxiliary binary (such as qemu-img) with a malicious wrapper. When the root daemon subsequently triggers the binary during routine execution (e.g., via multipass launch), the malicious code executes with root privileges, leading to local privilege escalation.
Impacted products
Vendor Product Version
Canonical Multipass Version: 0   
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CVE-2026-49238 (GCVE-0-2026-49238)
Vulnerability from cvelistv5
Published
2026-05-28 13:22
Modified
2026-05-28 14:24
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Summary
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 root privileges inside a guest virtual machine can bypass the FUSE layer by injecting raw SFTP frames (such as an SSH_FXP_OPEN request) directly into the sshfs_server process stdin/stdout pipes via procfs. By supplying a path containing directory traversal sequences that match the allowed mount prefix, the attacker can force the host-side root process to resolve the traversal and open files outside the designated mount boundary. This allows a guest-side user to read arbitrary files on the host filesystem, resulting in a virtual machine escape.
Impacted products
Vendor Product Version
Canonical Multipass Version: 0   
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Show details on NVD website


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CVE-2025-5199 (GCVE-0-2025-5199)
Vulnerability from cvelistv5
Published
2025-07-11 23:21
Modified
2025-07-14 20:12
CWE
  • CWE-276 - Incorrect Default Permissions
Summary
In Canonical Multipass up to and including version 1.15.1 on macOS, incorrect default permissions allow a local attacker to escalate privileges by modifying files executed with administrative privileges by a Launch Daemon during system startup.
Impacted products
Vendor Product Version
Canonical Multipass Version: 0   
Create a notification for this product.
Show details on NVD website


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CVE-2021-3747 (GCVE-0-2021-3747)
Vulnerability from cvelistv5
Published
2021-10-01 02:35
Modified
2024-09-17 04:19
CWE
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
Summary
The MacOS version of Multipass, version 1.7.0, fixed in 1.7.2, accidentally installed the application directory with incorrect owner.
References
Impacted products
Vendor Product Version
Canonical Multipass Version: 1.7   < 1.7.2
Create a notification for this product.
Show details on NVD website


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CVE-2021-3626 (GCVE-0-2021-3626)
Vulnerability from cvelistv5
Published
2021-10-01 02:35
Modified
2024-09-17 03:23
CWE
  • CWE-73 - External Control of File Name or Path
  • CWE-284 - Improper Access Control
Summary
The Windows version of Multipass before 1.7.0 allowed any local process to connect to the localhost TCP control socket to perform mounts from the operating system to a guest, allowing for privilege escalation.
References
Impacted products
Vendor Product Version
Canonical Multipass Version: unspecified   < 1.7.0
Create a notification for this product.
Show details on NVD website


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