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CVE-2026-33587

Lfnovo Open-notebook vulnerability

10.0 CRITICALEPSS 0.38%
  1. Published7 May 2026

Description

Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and subsequently OS commands) on the docker container via Server-Side Template Injection (SSTI) for user-created transformations.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Lfnovo Open-notebook< 1.8.4

Remediation

Fixed in
Lfnovo Open-notebook≥ 1.8.4

References

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Frequently asked

Is CVE-2026-33587 being actively exploited?

CVE-2026-33587 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.38%.

How severe is CVE-2026-33587?

CVE-2026-33587 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 0.38% probability of exploitation.

Which products are affected by CVE-2026-33587?

Affected products include Lfnovo Open-notebook.

How do I fix CVE-2026-33587?

Upgrade affected software to a fixed version, for example Lfnovo Open-notebook 1.8.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33587 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.