EUVD-2026-48329Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Authenticated user (PR:L) sends a network request (AV:N) with no interaction; unsandboxed Jinja2 escapes to root OS execution, a scope change (S:C) yielding full C/I/A impact.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Tugtainer is a self-hosted app for automating updates of Docker containers. Versions prior to 1.30.2 are vulnerable to Server-Side Template Injection (SSTI) in the notification template feature. The title_template and body_template fields are rendered using an unsandboxed jinja2.Environment, allowing any authenticated user to execute arbitrary OS commands as root inside the container. Version 1.30.2 fixes the issue.
Articles & Coverage 2
AnalysisAI
Server-side template injection in Tugtainer (self-hosted Docker container auto-update tool) versions before 1.30.2 lets any authenticated user achieve root-level OS command execution by injecting Jinja2 expressions into notification templates. The title_template and body_template fields are rendered by an unsandboxed jinja2.Environment, so template payloads escape into arbitrary code running as root inside the container. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated Tugtainer account (CVSS PR:L) and the ability to set the notification title_template or body_template fields, which are rendered by an unsandboxed jinja2.Environment; the payload fires when a notification is generated/rendered. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are largely consistent and point to a genuine high priority where an attacker already has any authenticated account. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with any valid Tugtainer login opens the notification settings and sets the body_template (or title_template) to a Jinja2 payload such as one that walks Python's object model to reach os.popen and run a reverse-shell or arbitrary command. When a notification renders, the payload executes as root inside the container, giving the attacker command execution and, via the mounted Docker socket, potential control over other containers. … |
| Remediation | Vendor-released patch: 1.30.2 - upgrade Tugtainer to 1.30.2 or later, which remediates the SSTI, and pull the corresponding container image and redeploy. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Tugtainer deployments and identify instances running versions prior to 1.30.2, then immediately revoke or restrict admin-level authenticated access to affected systems. …
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