# CVE-2026-8933: Canonical snapd privilege escalation in snap-confine

Source: https://junglewise.ai/threats/cve-2026-8933-canonical-snapd-privilege-escalation-in-snap-confine  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-21. Updated: 2026-07-21  
License: CC BY 4.0 with a link back

CVE-2026-8933 · Severity: high · CVSS 7.8 · Published 2026-07-21

A security flaw in the snap-confine component of Canonical's snapd service could allow a local user to gain full administrative (root) control over a Linux system. This component is responsible for creating secure environments for applications, but a bug in how it handles permissions allows an attacker to bypass these protections. This could lead to unauthorized access to sensitive data, system-wide outages, or the installation of malicious software.

Technologies: [Canonical Snapd](https://junglewise.ai/threats/technologies/snapd), [Canonical Ubuntu 22.04 LTS](https://junglewise.ai/threats/technologies/ubuntu). Vendors: [Canonical](https://junglewise.ai/threats/vendors/canonical).

## Quick answers

**Is CVE-2026-8933 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8933 being exploited in the wild.

**How severe is CVE-2026-8933?** High severity, with a CVSS score of 7.8, published 21 July 2026.

**Which products and versions are affected?** Canonical Snapd 2.75.0 to 2.76.1; Canonical Ubuntu 22.04 LTS versions prior to 2.76+ubuntu22.04.1; Canonical Ubuntu 24.04 LTS versions prior to 2.76+ubuntu24.04.1; Canonical Ubuntu 26.04 LTS versions prior to 2.76+ubuntu26.04.3.

**Is there a fix for CVE-2026-8933?** A patch was published on 2026-07-21. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-8933 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-8933?** Check whether you run Canonical Snapd, Canonical Ubuntu 22.04 LTS, Canonical Ubuntu 24.04 LTS or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A local privilege escalation vulnerability exists in snap-confine, a core component of Canonical snapd used to construct secure execution environments. The flaw resides in the initialization of privilege boundaries and security sandboxes when the binary is configured with set-capabilities and runs under limited ambient capabilities. A local, unprivileged attacker can exploit this logic error to bypass intended restrictions and execute arbitrary code with full root privileges. The vulnerability specifically affects installations using set-capabilities rather than the standard set-uid-root configuration. Patches have been released for snapd and various Ubuntu LTS versions.

## Affected products

- Canonical snapd 2.75.0 to 2.76.1
- Canonical Ubuntu 26.04 LTS versions prior to 2.76+ubuntu26.04.3
- Canonical Ubuntu 24.04 LTS versions prior to 2.76+ubuntu24.04.1
- Canonical Ubuntu 22.04 LTS versions prior to 2.76+ubuntu22.04.1

## Timeline

- 2026-07-21: disclosed
- 2026-07-21: advisory
- 2026-07-21: patched

## References

- [https://github.com/canonical](https://github.com/canonical)
- [https://launchpad.net/ubuntu/resolute](https://launchpad.net/ubuntu/resolute)
- [https://launchpad.net/ubuntu/noble](https://launchpad.net/ubuntu/noble)
- [https://launchpad.net/ubuntu/jammy](https://launchpad.net/ubuntu/jammy)
- [https://ubuntu.com/security/CVE-2026-8933](https://ubuntu.com/security/CVE-2026-8933)

## Related threats

- [Canonical snapd sandbox confinement bypass in snap-confine](https://junglewise.ai/threats/cve-2026-15226-canonical-snapd-sandbox-confinement-bypass-in-snap-confine)
- [Canonical snapd access control bypass in AppArmor configuration](https://junglewise.ai/threats/cve-2024-5300-canonical-snapd-access-control-bypass-in-apparmor-configuration)
- [Canonical ubuntu-pro-client information disclosure via process arguments](https://junglewise.ai/threats/cve-2026-9494-canonical-ubuntu-pro-client-information-disclosure-via-process)
- [Canonical ubuntu-pro-client insecure symlink following in collect-logs](https://junglewise.ai/threats/cve-2026-12391-canonical-ubuntu-pro-client-insecure-symlink-following-in-collect)
- [Canonical snapd privilege escalation via systemd-tmpfiles interaction](https://junglewise.ai/threats/cve-2026-3888-canonical-snapd-privilege-escalation-via-systemd-tmpfiles)