Critical severity · published May 7, 2026
CVE-2026-33587
Remote Code Execution (RCE) via Server-Side Template Injection (SSTI)
10.0
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ON
Open Notebook · Open Notebook
through 1.8.3 · source: vendor
OP
Open-notebook · Lfnovo
before 1.8.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33587
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33587
Vendor Advisory
https://github.com/lfnovo/open-notebook/security/advisories/GHSA-f35w-wx37-26q7
More from Open Notebook
8.1
CVE-2026-33588
Arbitrary File Write Through Path Traversal
7.8
CVE-2026-28201
SurrealDB Injection on Open Notebook
6.5
CVE-2026-33589
Arbitrary File Read via Local File Inclusion (LFI)