CVE-2026-66297: Improper Neutralization of Special Elements used in an OS Command (OS Command Injection) vulnerability in live

This month

HIGH 8.0UPGRADE

CVE-2026-66297 is a high-severity flaw (CVSS 8.0) affecting livebook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper 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 envir

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-08-05
Last modified	2026-10-23

Publisher (CNA): EEF · Vendor: livebook

Am I affected?

Timeline

2026-08-05 20:17 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

livebook livebook UPGRADE

Affected: >= 0.13.0 and < 0.18.7 · >= 0.19.0 and < 0.19.9

Fixed in: 0.18.7, 0.19.9

Safe to downgrade to: a release before 0.13.0

1. Check installed version

apt-cache policy livebook || rpm -q livebook || livebook --version

2. UPGRADE to 0.18.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade livebook

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade livebook

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.13.0 (Debian / Ubuntu)

apt-cache madison livebook sudo apt install livebook=<VERSION_BEFORE_0.13.0> sudo apt-mark hold livebook

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list livebook sudo dnf downgrade livebook-<VERSION_BEFORE_0.13.0> sudo dnf versionlock add livebook

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · pspp · FIXED · 2.1.3-2.fc46 · FEDORA-2026-0d6444911b · source

sudo dnf upgrade --advisory=FEDORA-2026-0d6444911b

Fedora ELN · barman · FIXED · 3.20.1-3.eln159 · FEDORA-2026-45ecf042c2 · source

sudo dnf upgrade --advisory=FEDORA-2026-45ecf042c2

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/livebook-dev/livebook/security/advisories/GHSA-qpjc-w5mm-73mj

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Related CVEs

CVE-2026-66881 HIGH 8.1 UPGRADE Relative Path Traversal vulnerability in livebook-dev livebook allows an attacker-authored notebook to write a
CVE-2026-68746 HIGH 8.8 UPGRADE Not Failing Securely ('Failing Open') vulnerability in livebook-dev livebook allows an unauthenticated network
CVE-2026-66298 HIGH 8.8 UPGRADE Origin Validation Error vulnerability in livebook-dev livebook allows untrusted notebook output JavaScript to
CVE-2026-66885 MEDIUM 6.5 UPGRADE Cross-Site Request Forgery (CSRF) vulnerability in livebook-dev livebook allows an attacker to authenticate a

References

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