CVE-2026-66297

HIGHNVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.0 under NVD CVSS v3. EPSS exploit probability: 1.9%, top 22% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.0Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 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.

CVSS v3
8.0
EG Score
8.0(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity80% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
78%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (6)

Auto-updated Aug 5, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github_commit

commit f8fe9c62cb8b (livebook-dev/livebook)

Fix landed in livebook-dev/livebook commit f8fe9c62cb8b — awaiting tagged release

https://github.com/livebook-dev/livebook/commit/f8fe9c62cb8bfc1dd0ccda4ea4a57c5e91563c85
github_commit

commit 0c2487326bbb (livebook-dev/livebook)

Fix landed in livebook-dev/livebook commit 0c2487326bbb — awaiting tagged release

https://github.com/livebook-dev/livebook/commit/0c2487326bbb37cb1eb43bb2f76eb93ad9f8fd6b
github_commit

commit b2a8416d1490 (livebook-dev/livebook)

Fix landed in livebook-dev/livebook commit b2a8416d1490 — awaiting tagged release

https://github.com/livebook-dev/livebook/commit/b2a8416d149043132fe5a14ed611e0fefc9dc9cd
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-66297
generic

CVE-2026-66297

https://cna.erlef.org/cves/CVE-2026-66297.html
github Patch Available🟡 PoC Available

Unescaped deployment environment variables in generated setup commands · Advisory · livebook-dev/livebook · GitHub

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

Affected Packages

(1 across 1 ecosystem)
Hex(1)
PackageVulnerable rangeFixed inDependents
livebook0.13.0 ... 0.19.8 (45 versions)0.19.9—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-26 16:36 UTCEG score recompute
  2. 2026-08-26 14:47 UTCEPSS rescore
  3. 2026-08-25 15:34 UTCEG score recompute
  4. 2026-08-25 13:49 UTCEPSS rescore
  5. 2026-08-24 14:42 UTCEG score recompute
  6. 2026-08-23 01:15 UTCEG score recompute
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-22 00:26 UTCEG score recompute
  9. 2026-08-21 23:49 UTCEPSS rescore
  10. 2026-08-20 23:36 UTCEG score recompute
  11. 2026-08-20 22:56 UTCEPSS rescore
  12. 2026-08-19 22:49 UTCEG score recompute
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-18 21:59 UTCEG score recompute
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-17 21:08 UTCEG score recompute
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-16 20:20 UTCEG score recompute
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 07:56 UTCEG score recompute
  21. 2026-08-15 07:08 UTCEG score recompute
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-14 06:19 UTCEG score recompute
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-12 17:07 UTCEG score recompute
Show 21 more
  1. 2026-08-12 13:51 UTCEPSS rescore
  2. 2026-08-11 16:18 UTCEG score recompute
  3. 2026-08-11 03:53 UTCEG score recompute
  4. 2026-08-11 00:00 UTCEPSS rescore
  5. 2026-08-10 15:29 UTCEG score recompute▲ 3.10
  6. 2026-08-10 15:28 UTCNVD updateCVSS v3 → 8 · severity → HIGH
  7. 2026-08-09 22:28 UTCEG score recompute
  8. 2026-08-09 13:47 UTCEPSS rescore
  9. 2026-08-08 20:15 UTCEG score recompute
  10. 2026-08-08 16:37 UTCEPSS rescore
  11. 2026-08-07 18:01 UTCEG score recompute
  12. 2026-08-06 15:48 UTCEG score recompute
  13. 2026-08-06 13:47 UTCEPSS rescore
  14. 2026-08-06 13:37 UTCEG score recompute▼ 0.10
  15. 2026-08-06 13:35 UTCNVD updateCVSS v3 → 4.9 · CVSS v4 → 4.9
  16. 2026-08-06 13:09 UTCEG score recompute▲ 0.10
  17. 2026-08-06 13:08 UTCMITRE cvelistV5CVSS v3 → 5 · CVSS v4 → 5
  18. 2026-08-05 20:32 UTCEG score recompute▼ 0.10
  19. 2026-08-05 20:32 UTCNVD updateCVSS v3 → 4.9 · CVSS v4 → 4.9
  20. 2026-08-05 20:15 UTCEG score recompute
  21. 2026-08-05 20:15 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66297?
CVE-2026-66297 is a high vulnerability published on August 5, 2026. 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.dockerinstructions/2 and…
When was CVE-2026-66297 disclosed?
CVE-2026-66297 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66297 actively exploited?
CVE-2026-66297 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 22.2% of all scored CVEs.
What is the CVSS score of CVE-2026-66297?
CVE-2026-66297 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2026-66297?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66297, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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