CVE-2026-8933highCWE-250

CVE-2026-8933: high-severity vulnerability in snapd

snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 7.8epss 0.3%
from disclosure to weapon88 days
Published on NVDJul 21
1st PoC+88d
A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
snapdCanonical · Ubuntu 22.04 LTSCanonical · Ubuntu 24.04 LTSCanonical · Ubuntu 26.04 LTS
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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