Unescaped deployment environment variables in generated setup commands

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-66297
StatePUBLISHED
AssignerEEF
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-05 20:17:11 UTC
Updated2026-08-10 15:17:10 UTC
DescriptionImproper Neutralization of Special Elements used in an OS Command (OS Command Injection) vulnerability in livebook-dev livebook allows command injection into generated deployment setup commands. LivebookWeb.Hub.Teams.DeploymentGroupAgentComponent.docker_instructions/2 and LivebookWeb.Hub.Teams.DeploymentGroupAgentComponent.fly_instructions/4 in lib/livebook_web/live/hub/teams/deployment_group_agent_component.ex interpolate deployment group environment variable values into the generated Docker and Fly.io setup commands without shell escaping. The values originate from the deployment group configuration and reach the sinks through Livebook.Hubs.Dockerfile.online_docker_info/3. Both sinks place the value inside a double-quoted shell word, so a value containing a command substitution such as $(...) or backticks is evaluated by the shell without any need to break out of the quoting, and a literal double quote terminates the quoted word and allows arbitrary further tokens. The generated command is displayed in the Livebook web interface with a copy button, so a user who copies it and runs it without reviewing it first executes the injected commands on their own machine, under their own account. An attacker requires privileges sufficient to set deployment group environment variables, while the resulting code execution occurs on the machine of whoever runs the generated command. The Kubernetes instructions are not affected, because they render the same values into a YAML manifest with escaping rather than into a shell command. This issue affects livebook: from 0.13.0 before 0.18.7 and from 0.19.0 before 0.19.9.

Risk And Classification

Primary CVSS: v4.0 4.9 MEDIUM from 6b3ad84c-e1a6-4bf7-a703-f496b71e49db

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.013060000 probability, percentile 0.678340000 (date 2026-08-09)

Problem Types: CWE-78 | CWE-78 CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

VersionSourceTypeScoreSeverityVector
4.06b3ad84c-e1a6-4bf7-a703-f496b71e49dbSecondary4.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/C...
4.0CNACVSS5MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
3.1[email protected]Primary8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
Active
Confidentiality
None
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
High
Sub Availability
High

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Livebook Livebook All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Livebook-dev Livebook affected 0.13.0 0.18.7 semver Not specified
CNA Livebook-dev Livebook affected 0.19.0 0.19.9 semver Not specified
CNA Livebook-dev Livebook affected 0.13.0 0.18.7 other Not specified
CNA Livebook-dev Livebook affected 0.19.0 0.19.9 other Not specified
CNA Livebook-dev Livebook affected 0.13.0-cuda12 0.18.7-cuda12 other Not specified
CNA Livebook-dev Livebook affected 0.19.0-cuda12 0.19.9-cuda12 other Not specified
CNA Livebook-dev Livebook affected 7cf4af5c10ec645f55a10f30e5661c54f6a6b319 * git Not specified

References

ReferenceSourceLinkTags
github.com/livebook-dev/livebook/security/advisories/GHSA-qpjc-w5mm-73mj 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Exploit, Patch, Vendor Advisory
github.com/livebook-dev/livebook/commit/f8fe9c62cb8bfc1dd0ccda4ea4a57c5e... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com Patch
github.com/livebook-dev/livebook/commit/b2a8416d149043132fe5a14ed611e0fe... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com Patch
osv.dev/vulnerability/EEF-CVE-2026-66297 6b3ad84c-e1a6-4bf7-a703-f496b71e49db osv.dev Third Party Advisory
github.com/livebook-dev/livebook/commit/0c2487326bbb37cb1eb43bb2f76eb93a... 6b3ad84c-e1a6-4bf7-a703-f496b71e49db github.com Patch
cna.erlef.org/cves/CVE-2026-66297.html 6b3ad84c-e1a6-4bf7-a703-f496b71e49db cna.erlef.org Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Nguyễn Công Tú (en)

CNA: Jonatan Kłosko (en)

CNA: José Valim (en)

CNA: Jonatan Männchen / EEF (en)

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