CVE-2026-33587
CVE-2026-33587 is a critical-severity vulnerability in Lfnovo Open-notebook with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.
Key facts
- Severity: Critical (CVSS 3.x base score 10.0)
- CVSS v4: 9.2
- EPSS exploit prediction: 0% (30th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-28346
- Weakness: CWE-20
- Affected product: Lfnovo Open-notebook
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-33587?
- 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.
- How severe is CVE-2026-33587?
- CVE-2026-33587 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-33587 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-33587?
- CVE-2026-33587 affects Lfnovo Open-notebook. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-33587?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-33587 have an EU (EUVD) identifier?
- Yes. CVE-2026-33587 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28346.
- When was CVE-2026-33587 published?
- CVE-2026-33587 was published on 2026-05-07 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:lfnovo:open-notebook:*:*:*:*:*:*:*:*
More vulnerabilities in Lfnovo Open-notebook
- CVE-2026-33588 — High (CVSS 8.1): Lack of user input validation in the file upload functionality of Open Notebook v1.8.3 allows the application user to…
- CVE-2026-28201 — High (CVSS 7.8): An improper input validation, together with an overly permissive default CORS configuration in Open Notebook v1.8.1…
- CVE-2026-33589 — Medium (CVSS 6.5): Lack of user input validation in the file upload functionality of Open Notebook v1.8.3 allows the application user to…
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